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3 years ago

Pls help me!!!! I will give brainliest!!!!

Mathematics

2 answers:

Yakvenalex [24]3 years ago

7 0

Answer:

Step-by-step explanation:

There are 10 numbers from 0 to 9

x - number of numbers that represent a success

The probablity of success: $\dfrac x{10}$

$\dfrac x{10}=70\%\\\\\dfrac x{10}=\dfrac{70}{100}\\\\\dfrac x{10}=\dfrac{7}{10}\\\\x=7$

there are 7 numbers from 0 to 6

Gwar [14]3 years ago

5 0

Answer:

Step-by-step explanation:

because the numbers 0-9 consist of 10 numbers,

having a 70% chance of success means that out of the 10 numbers, 7 are correct.

thus, choice B is correct as it have 7 numbers in it

(rmb to count "0" as a number!)

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Terra wants wall-to-wall carpeting in her bedroom, which measures 10’ x 12’6”. Carpeting is on sale for $24.99 per sq. yd. What

dlinn [17]

Answer:

$347.08

Step-by-step explanation:

10' x 12'6" = 125 ft^2

one yd^2 = 9 ft^2

125/9 = 13.89 yd^2

13.89 x $24.99 = $347.08

6 0

3 years ago

A retail store did research and determined that, on average, each customer spends 40 minutes in their store per visit, with a st

Blababa [14]

Answer:

0.13% of customers spend more than 46 minutes

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

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

$Z = \frac{X - \mu}{\sigma}$

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.

In this problem, we have that:

$\mu = 40, \sigma = 2$

What percentage of customers spend more than 46 minutes?

This is 1 subtracted by the pvalue of Z when X = 46. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{46 - 40}{2}$

$Z = 3$

$Z = 3$ has a pvalue of 0.9987

1 - 0.9987 = 0.0013

0.13% of customers spend more than 46 minutes

6 0

3 years ago

PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!!

balu736 [363]

x equals 4 and y equals 5 . so the formula would be 5x+12y=80 and if we need 4 of the small boxes we sub x for 4 and we get 5(4) =20. Next, 80 minus 20 is 60, and the equation would now be 12y=60. we now divide both sides by 12 and we get left with y=5. 5x + 12y = 80 5(4) + 12(5)=80 20+60=80. That is all. I hope that doesn't sound confusing

5 0

3 years ago

Parker is going to attend a four-year university that has an annual tuition of $16,110. He has $45,800 in savings and has a gran

Svetlanka [38]

Answer:

$13,640

Step-by-step explanation:

money that need to pay for the tuition for all four years

=$16,110×4

=$64,440

the money he had

=$45,800+$5,000

=$50,800

the difference

=$64,440-$50,800

=$13,640

3 0

3 years ago

The expression f(x) = 12(1.035)* models the monthly growth of membership in the new drama club at a school. According to the fun

olga nikolaevna [1]

Answer:

The monthly growth rate is 3.5%.

Step-by-step explanation:

The exponential growth function is given as follows:

$y=a(1+r)^{x}$

Here,

y = final value

a = initial value

r = growth rate

x = time taken

The provided expression for the monthly growth of membership in the new drama club at a school is:

$f(x) = 12\cdot(1.035)^{x}$

Comparing this function with the exponential growth function:

$a(1+r)^{x}=12(1.035)^{x}\\\\a(1+r)^{x}=12(1+0.035)^{x}$

Then value of r is 0.035 or 3.5%.

Thus, the monthly growth rate is 3.5%.

7 0

3 years ago