Help me pls I’ll give brainliest

Answer:

78.5cm^2

Step-by-step explanation:

Circumference equation = 2πr with radius r

10π = 2πr so r = 10π/2π = 5

Area of circle = πr^2

π * 5^2 = π * 25 = 25π = 78.53981... = 78.5 cm^2

Andrew has 17 dollars left for gift c

Answer:

Min 31

Q1 38

Median 49

Q3 52

Max 65

Step-by-step explanation:

Max number

Min number

Answer:

Min: 31

Q1: 38

Median: 49

Q3: 52

Max: 65

Step-by-step explanation:

Min Number: 31

Max Number: 65

Answer:

0.00375 inches thick

Answer:

Step-by-step explanation:

16ft(13ft)(b/26ft^2)=8b

So he’ll need 8 bags

Answer:

Less than 4 is 1,2,3

So 3/12=1/4

Answer:

The standard form is 3x-5y-30=0

Answer:

$25

Step-by-step explanation:

Simply by using long division, this can be solved. Change 60% into its decimal form (0.6,) and divide 15 by 0.6.

Answer:

The perimeter is 24 in2

Step-by-step explanation:

You have to add up all of the sides together

Answer:

the answer 24

Step-by-step explanation:

P= 10+6+8=24 in

because perimeter is just adding

Answer: $5115

Step-by-step explanation:

The following information can be gotten from the question:

Mean = 6800

Standard deviation = 2500

We will then find the Z score of the 25th percentile which will be -0.674.

Therefore, the cutoff for the salary that corresponds to the lower 25% of all salaries will be:

= 6800 - 0.674 × 2500

= 6800 - 1685

= 5115

The cutoff is $5115

Answer:

6 ? (i think)

Step-by-step explanation:

Answer:

0.2

Step-by-step explanation:

2/10 or 1/5

Answer:

0.2

Step-by-step explanation:

Answer:

The answer to the equation was c so yes you are right:)

Answer:

6/35

Step-by-step explanation:

2/5x3/7

Multiply Numerators and Denominators

= 6/35

You can't further simplify so the answer is 6/35.

Answer:

6/35

Step-by-step explanation:

hope this helps, would consider downloading photomath

Answer: 2 cans of soup left.

Step-by-step explanation:

1/2 of 8 = 4.

1/4 of 8 = 2.

4 + 2 = 6, so you are giving 6 cans of soup away. 8 - 6 = 2. In conclusion, you have 2 cans of soup left.

Answer: I think it's Sporting Life:)

hope this help!

Answer:

66

Step-by-step explanation:

added and dont stop untill the end

Answer:

It is 1174.

Step-by-step explanation:

Answer:

16 cookies. Try your best.

Answer: 16

Step-by-step explanation:

We can solve this by using the equation: 4/5 x 20 = y

(y is the answer)

Now we can solve it. You can just solve 4/5 x 20, or if you like using decimals you can change it to 0.8 x 20, becaues 4/5 is equivalent to 0.8.

0.8 x 20 = 16.

Therefore, out of the 20 cookies, 16 are chocolate chip.

Answer:

do u have a picture or smth? there is not enough info

[tex] \begin{cases} (-1, 2) \\ (-4, 3) \end{cases}[/tex]

[tex]m = \frac{dy}{dx} = \frac{y_2-y_1}{x_2-x_1}[/tex]

Substitute the coordinate points in.

[tex]m = \frac{3 - 2}{ - 4 - ( - 1)} \\ m = \frac{1}{ - 4 + 1} \longrightarrow \frac{1}{ - 3} \\ m = - \frac{1}{3} [/tex]

Hence, the value of m is - 1/3.

[tex]y = mx + b \\ \sf{where \: \: m \: \: = \: \: slope}[/tex]

[tex] \large\boxed{m = - \frac{1}{3} }[/tex]

Answer:

n = 2

Step-by-step explanation:

Answer:

n = 2

Step-by-step explanation:

0.7n-1.5+7.3n=14.5​

Add like terms

(0.7n + 7.3n) + (-1.5) = 14.5

8n -1 .5 = 14.5

Add 1.5 to both sides.

8n =1 6

Divide both sides by 8.

n = 2

Answer:

12 meters = 472.441 inches

~Hope this helps~

Answer: they would both have $240 in 3 months

Step-by-step explanation:

180 + 20 + 20 + 20 = 240

120 +40 + 40 + 40 =240

-

180+20=200+20=220+20=240

120+40=160+40=200+40=240

and there u go :)

Answer:

Time T = 15 year

Step-by-step explanation:

Given:

Interest I = $270,000

Principal P = $150,000

Rate R = 12% = 0.12

Find:

Time T

Computation:

I = PRT

270,000 = (150,000)(0.12)(T)

270,000 = (18,000)(T)

Time T = 15 year

Answer:

8+7=15

Step-by-step explanation:

Just add 8+7 which will equal 15

Answer:

The answer is 15

Step-by-step explanation:

Hoped this helped!

Step-by-step explanation:

Answer:

9

Step-by-step explanation:

Khan Academy

Answer:

1742 hours

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

When the distribution is normal, we use the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Single light:

Mean of 1700 hours and standard deviation of 400 hours, which means that [tex]\mu = 1700, \sigma = 400[/tex]

Sample of 64:

This means that [tex]n = 64, s = \frac{400}{\sqrt{64}} = 50[/tex]

The probability is 0.20 that the sample mean lifetime is more than how many hours?

This is the 100 - 20 = 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.84

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

By the Central Limit Theorem

[tex]Z = \frac{X - \mu}{s}[/tex]

[tex]0.84 = \frac{X - 1700}{50}[/tex]

[tex]X - 1700 = 50*0.84[/tex]

[tex]X = 1700 + 50*0.84[/tex]

[tex]X = 1742[/tex]