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3 years ago

5

An individual was making blankets for a few friends. The individual used 6.25 feet of fabric for one blanket. If the individual

makes 7 blankets, how many feet of fabric will the individual have used to make 7 blankets (round to the nearest whole number)?

1 answer:

sleet_krkn [62]3 years ago

5 0

6.25 feet x 7 blankets = 43.75 feet

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a square with an area of 144 cm² is reduced by a factor of 1/3 how long are the new sides of the square?

olga55 [171]

Answer:

4 cm

Step-by-step explanation:

The square root of 144 is 12 (12 x 12 = 144) so we know our sides of the square are 12 cm²

12 / 3 = 4

( $\frac{12}{1} x \frac{1}{3}$ )

The sides of the new square are 4 :)

Hope this helps and is correct, have a nice day! :D

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3 years ago

<img src="https://tex.z-dn.net/?f=%5Csf%20%5Csqrt%7B12%7D%20%5Ctimes%20%5Csqrt%7B12%7D" id="TexFormula1" title="\sf \sqrt{12} \t

Darina [25.2K]

Answer:

$12$

Step-by-step explanation:

$\sqrt{12} \times\sqrt{12}$

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$\sqrt{12}\sqrt{12}=12$

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7 0

3 years ago

Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of

Oduvanchick [21]

Answer:

a) The company should expect to replace 11.51% of its batteries.

b) 35 months.

Step-by-step explanation:

Problems of normally distributed samples can be 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:

$\mu = 43.8, \sigma = 6.5$

(a) If Quick Start guarantees a full refund on any battery that fails within the 36-month period after purchase, what percentage of its batteries will the company expect to replace?

This is the pvalue of Z when X = 36. Then

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

$Z = \frac{36 - 43.8}{6.5}$

$Z = -1.2$

$Z = -1.2$ has a pvalue of 0.1151.

The company should expect to replace 11.51% of its batteries.

(b) If quick Start does not want to make refunds for more than 10% of its batteries under the full refund guarantee policy, for how long should the company guarantee the batteries (to the nearest month)?

The warranty should be the 10th percentile, which is X when Z has a pvalue of 0.1. So it is X when Z = -1.28.

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

$-1.28 = \frac{X - 43.8}{6.5}$

$X - 43.8 = -1.28*6.5$

$X = 35.48$

To the nearest month, 35 months.

7 0

3 years ago

At a fabric store, metallic ribbon costs $16 for 4 ft. White ribbon is priced at 3 ft per dollar. Use rates to show which kind o

Elis [28]

Metallic ribbon: 16$ for 4ft

Dividing both sides by four, we get:

1 feet -- 4 dollars

White ribbon 3$ for 1 feet

1 feet -- 3 dollars

<h2><u><em>Therefore, the Metallic ribbon costs more per feet.</em></u></h2>

4 0

2 years ago

Please help! Correct answer only please!

victus00 [196]

The answer would be A , that’s his slugging percentage ! Hope this helps !

6 0

3 years ago