Football The function defined by h = -5t² + 20t + 2 indicates the approximate height h of a soccer ball. in meters according to the elapsed time t in seconds, since it was launched. This ball hit the ground before a receiver managed to approach it. How much time has the balloon spent in the air, to the nearest tenth of a second! For how many seconds was he at a height of at least 17 m?
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A square fits exactly inside a circle with each of its vertices being on the circumference of the circle
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A circle’s area can be calculated by (pi d^2)/4 We have an area of 56 cm (^2?), so
pi d^2 = 56 x 4 (or 224) d^2 = 224/pi, d = √(224/pi)
A circle circumscribed around a square has a diameter equivalent to the length of the square’s diagonal, so the square’s diagonal is √(224/pi) (same as the circle diameter…)
A square’s side can be calculated, knowing its diagonal length, by use of Pythagoras’ theorem… The diagonal √(224/pi) is squared, divided by two, since the square’s sides are all equal, and the resulting number’s square root is calculated.
Squaring √(224/pi), we get 224/pi, and dividing by two, we get 112/pi, which is 35.6507 (cm^2), and the square root is 5.9708 cm, the side of the square.
I cannot emphasize enough that a drawing or sketch is an invaluable tool for these tasks, it saves having to retain a “picture” in your head. Note that a calculator was not required up until the last moment, dividing 112 by pi, and finding the square root of that answer. Picking up the calculator too early obliges you to transcribe numbers from the calculator to paper, and that can lead to issues. Try to enjoy maths, see it as a challenge not a chore. (and use correct units!)
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Related Questions (More Answers Below)
a rectangular swimming pool is 15 feet long and x feet wide. What is the perimeter when x=12 feet
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Answer: 54 square feet
Step-by-step explanation:
To find perimeter of a rectangle we must use the formula l+l+w+w=p where l and w represent width and length
Since we know length and width is x=12 just substitute so
15+15+12+12=54 so 54 is the perimeter
please please please please help me
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Sim porque positivo não fecha
help pls! ill mark best answer brainliest
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Select the two
pairs of figures that are similar.
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Answer:
the first 2 pairs are equal in shape and proportion.
Fill in the blank
When you multiply exponents with the same base, you _______ the base, and ________ the exponents
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Answer:
multiply the base and add the exponents
answer to 9+5u+6u+1 ??
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Answer:
.10 + 11u or 11u + 10
Step-by-step explanation:
combine like terms:
. 5u + 6u = 11u
. 9 + 1 = 10
Answer:
10+11u
Step-by-step explanation:
9+5u+6u+1
1. add the numbers that are the same. 9+1= 10
2.do the same thing to the other number(s) 5u+6u= 11u
3. add both you're answers together 10+11u
Simplify the expression to a+bi form:
(-6-10i)(2-3i)
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Answer:
-42-2i
Step-by-step explanation:
Round: 3052.08
To the nearest hundredth
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Answer:
3052.08
Step-by-step explanation:
since there is nothing next to the hundredths place its 3052.08, unless your taking about the hundreds place then it would be 3100.00.
SOMEONE PLS HELP!!! ITS DUE !!!
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Answer:
d we cannot compare it volume to bh cubic inches
The school band is having a car wash to raise money. There goal is to collect $150. So far they have earned $10 each from three families and $5 each from 15 families.How much more money do they have to earn to reach their goal?
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Who understands how to do this mess?
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Answer: 140
Step-by-step explanation:
Angle 4 and A are supplementary meaning they add to 180
Thus you can do 180-40 = 140 to get that angle A = 140.
Since the two lines are parallel, Angle A is congruent to Angle D. Then, since Angle D is opposite Angle 3, we know that that Angle 3 and Angle D are congruent.
x
For f(x)=0.01(2) , find the average rate of change from x=3 to x=8.
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Option b. 0.496
Step-by-step explanation:we know that
f(x)=0.01(2^{x})
The average rate of change is equal to
\frac{f(b)-f(a)}{b-a}
where
a=3
b=8
f(a)=f(3)=0.01(2^{3})=0.08
f(b)=f(8)=0.01(2^{8})=2.56
Substitute
\frac{2.56-0.08}{8-3}
\frac{2.48}{5}
0.496
You have $35 in your bank account and deposit $2.50 each week. At the same time, your cousin has $115 but is withdrawing $7.50 each week. When will the accounts have the same balance? How much will they have?
What are the variables and equations, and how do you solve?
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Answer:
$55
Step-by-step explanation:
Let w = the no. of weeks
35 + 2.50w = amount you will have in the account after w weeks
115 - 7.5w = amount cousin will have in the account after w weeks
You need to set these expressions equal to each other.
35 + 2.50w = 115 - 7.5w Multiply thru the equation
by 10 to remove the fractions
350 + 25w = 1150 - 75w
100w = 800
w = 8 weeks
35 + 2.50w = 35 + 2.5(8) = 35 + 20 = $55
115 - 7.50w = 115 - 7.50(8) = 115 - 60 = $55
Here are the first five terms of an arithmetic sequence
5 8 11 14 17
Find an expression for the nth term of this sequence:
A: 3n+2
B: 5n+3
C: add 3 each times
D: 3n
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the difference between each term is 3 meaning it’s 3n. if you then take away 3 from the first term you are left with 2. this means the nth term is 3n+2
Use the translation (x, y) = (x + 5, y - 9) for questions a-e.
a. What is the image of A (-6, 3)?
b. What is the image of (4,8)?
c. What is the image of (5.-3)?
d. What is the image of A from #1, which would be called A"?
e. What is the pre-image of D' (12. 7)? (x - 5, y + 9)
Help please!!
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Answer: it’s a I have the same question but I have to solve and they already gave me the answer
Step-by-step explanation:
Find tan(B) in the triangle
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Answer:
Answer is B
Step-by-step explanation:
SohCahToa
[tex]tan = \frac{o}{a} [/tex]
Hypotenuse : Opposite the right angle. : 13
Opposite : Opposite the B angle : 5
Adjacent : The only side left : 12
we need opposite and adjacent, hypotenuse is irrelevant in this question.
Substitute the numbers
[tex]tan( \frac{5}{12} )[/tex]
I NEED HELP ON THIS ONE TOO SAME THING ILL GIVE BRAINLIEST
Cassidy plans to paint the four walls of her bedroom. Each wall measures 12 feet by 10 feet. The window measures 2.5 feet by 4 feet. The door measures 3 feet by 7 feet. How many square feet will Cassidy paint if she does not paint the window and door? Sketch the figure below and show are calculations.
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Answer:
449 sq ft
Step-by-step explanation:
9(w + 6) simplified. please help!
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Answer:
9w+54
Step-by-step explanation:
9(w + 6
distribute
9w+54
A survey asked 12 students how many portable electronic devices they have in
their homes. The results are shown in the line plot below.
Based on the data in the line plot, calculate the following.
SHOW YOUR WORK! Each question is worth 2 points.
a) Mean (Round your answer to the nearest tenth.)
b) Median
c) Mode
d) Range
e) What percentage of the students have more than 3 portable electronic
devices in their home? Give your answer as a fraction, decimal, and percent.
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Answer:
should be either b or c
Step-by-step explanation:
Answer:
Mean: 4.6666666
Mode: 5.5
Range: 6
75%
Step-by-step explanation:
can someone help me solve this?
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Answer:
Try B
Step-by-step explanation:
That's what I would choose. Sorry if it's wrong.
Can someone help me on this
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Answer:
P = 44
Step-by-step explanation:
perimeter of a square = 4a
where a = side lenght
equation:
⇒ 4a
solve by substituting 11 for a
⇒ 4a
⇒ 4 x 11
⇒44
A square has an area of 36 m2. The square is scaled in such a way that its area is increased by 28 m2. What is the approximate factor by which the length of the side of the square is increased?
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Answer:
The length has increased by a factor of 4/3 or 1 1/3
Step-by-step explanation:
To find the initial length.: root 36.
Root 36 = 6
Then to find the increased version, first find the area: 36 + 28 = 64
Now, the length.
Root 64 = 8
To find the factor it increased by:
6x = 8
x = 8/6 = 4/3
The length has increased by a factor of 4/3 or 1 1/3
what ratio is equivalent to 9/8
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Answer:
3:4
Step-by-step explanation:
divide into simplest form would be 3:4
Answer:
:)
Step-by-step explanation:
9 :8 18 :16 27: 24 36:32 45:40 54:48 63:56 72:64 81:72 90:80 99:88
Can someone please help me answer this??
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In other words, y-2 goes in the first box and 5 goes in the second box.
=================================================
Work Shown:
y^2 - 4y - x + 9 = 0
y^2 - 4y + 9 = x
x = y^2 - 4y + 9
x = y^2 - 4y + 4 + 5 .... rewrite 9 as 4+5
x = (y^2-4y+4) + 5
x = (y-2)^2 + 5 .... apply the perfect square factoring rule
So we'll have y-2 go in the first box and 5 goes in the second box
note: One version of the perfect square factoring rule says (a-b)^2 = a^2-2ab+b^2.
94.76 is 23% of what number?
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Answer:
412
Step-by-step explanation:
i need more letters snsnsnsnsjjs
Which number is irrational?
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Answer:
Irrational numbers are numbers that cannot be expressed as the ratio of two whole numbers. This is opposed to rational numbers, like 2, 7, one-fifth and -13/9, which can be, and are, expressed as the ratio of two whole numbers.
How many right angles need to be put together to make:
a.) 360 degrees?
b.) 180 degrees?
C.) 270 degrees?
d.) A straight angle?
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Answer:
A 180° angle is called a straight angle. Angles such as 270 degrees which are more than 180 but less than 360 degrees are called reflex angles. A 360° angle is called a complete angle.
Answer:
A. 4
B. 2
C. 3
D. 2
Step-by-step explanation:
Multiplication!!! Always remember that a right angle is 90 degrees, also a straight angle is 180 degrees..
Remember like this:
90 x 1 =90
90 x 2 =180
90 x 3 = 270
90 x 4 = 360
Which is equivalent to 16^3/4
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Answer:
1024
Step-by-step explanation:
an isosceles triangle has at least__congruent sides
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Answer:
two
Step-by-step explanation:
an isosceles triangle has at least two congruent sides