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Citrus2011 [14]
3 years ago
8

Two women were complaining about their teenagers’ preoccupation with clean hair. One moaned, “My four boys will use up three bot

tles of shampoo in two weeks.” The other replied, “My five girls will use up four bottles of shampoo in three weeks.” Who uses the most shampoo in a week: one of the boys or one of the girls? How much more?
Mathematics
1 answer:
olga2289 [7]3 years ago
3 0
Girls 5%

( girls 5 to 4 and boys 4 to 3)
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To ship a package, a shipping company charges $2.74 for each pound. How much would it cost to ship a 6.7-pound package?
Olin [163]
I'm pretty sure this would be 18.358
3 0
3 years ago
Melvin is pushing a tire during workout with the dimensions shown how many square inches of space has a tire covered after Melvi
valentina_108 [34]

Answer:

The answer is below

Step-by-step explanation:

The question is not complete, but I would show you how to solve it.

Solution:

A circle is the locus of a point such that its distance from a fixed point which is its center is always constant.

The tire has the shape of a circle. Therefore the distance the tire covers if it is pushed around once is the same as the circumference of the tire. The circumference is given by:

Circumference = 2πr; where r is the radius of the tire

Let us assume that the tire has a radius of 7 cm. Hence:

Circumference = 2π(7) = 44 cm

If the tire moves around 5 times, the distance covered = 5 * circumference of tire = 5 * 44 cm = 220 cm

6 0
3 years ago
A manufacturer of running shoes knows that the average lifetime for a particular model of shoes is 15 months. Someone in the res
Alexus [3.1K]

Answer:

Step-by-step explanation:

Hello!

So you have a new type of shoe that lasts presumably longer than the ones that are on the market. So your study variable is:

X: "Lifetime of one shoe pair of the new model"

Applying CLT:

X[bar]≈N(μ;σ²/n)

Known values:

n= 30 shoe pairs

x[bar]: 17 months

S= 5.5 months

Since you have to prove whether the new shoes last more or less than the old ones your statistical hypothesis are:

H₀:μ=15

H₁:μ≠15

The significance level for the test is given: α: 0.05

Your critical region will be two-tailed:

Z_{\alpha /2} = Z_{0.025}= -1.96

Z_{1-\alpha /2} = Z_{0.975}= 1.96

So you'll reject the null Hypothesis if your calculated value is ≤-1.96 or if it is ≥1.96

Now you calculate your observed Z-value

Z=<u>x[bar]-μ</u> ⇒ Z=<u>    17-15     </u> = 1.99

     σ/√n              5.5/√30

Since this value is greater than the right critical value, i.e. Zobs(1.99)>1.96 you reject the null Hypothesis. So the average durability of the new shoe model is different than 15 months.

I hope you have a SUPER day!

5 0
3 years ago
Find the value of x. A. 0 B. 3 C.4 D. 12.
aleksandrvk [35]

Answer:

B = 3

Step-by-step explanation:

3x + 15 = 4x + 12

= 15-12=4x-3x

= 3 = x

X = 3

8 0
2 years ago
You and your business partner are mailing advertising flyers to your customers. You address 6 flyers
jonny [76]

Answer:

140

Step-by-step explanation:

3 0
3 years ago
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