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shepuryov [24]
3 years ago
10

Sarah’s neighbor offers to pay her $5 for every shark tooth she finds on the beach. After collecting only three shark’s teeth, S

arah decides to share the opportunity with her friend John. Sarah can find shark teeth twice as fast as John, but she can earn even more money with his help.
Sarah can use the expression 5(2j + 3 + j) to represent the amount of money she can earn. Write a few sentences to end Sarah’s story. How many shark teeth did she find? How many shark teeth did John find? How much money did Sarah earn?
Mathematics
1 answer:
In-s [12.5K]3 years ago
3 0

Answer:

Sarah would have $15 dollars.

Step-by-step explanation:

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A random sample of 20 married women showed that the mean time spent on housework by them was 29.8 hours a week with a standard d
DanielleElmas [232]

Answer:

95% confidence interval for the mean time spent on housework per week by all married women.

( 26.66 , 32.94)

Step-by-step explanation:

<u><em>Step(i)</em></u>:-  

Given random sample size 'n' = 20

Mean of the sample (x⁻ ) = 29.8 hours

Standard deviation of the sample (S) = 6.7

Given Margin of error = 3.14

<u><em>Step(ii):</em></u>-

95% confidence interval for the mean is determined by

(x^{-} - t_{0.05} \frac{S}{\sqrt{n} } , x^{-} +t_{0.05} \frac{S}{\sqrt{n} })

We know  that margin of error is determined by

M.E = \frac{t_{0.05}XS.D }{\sqrt{n} } = 3.14

Now 95% confidence interval for the mean time spent on housework per week by all married women.

(29.8 - 3.14 , 29.8+3.14)

( 26.66 , 32.94)

8 0
3 years ago
Ed wants to bicycle at least 75 miles this week. The inequality 11 + 4b &gt; 75 can be used to find the average number of miles
jeyben [28]

Answer: Ed should bike at least more than 16 miles

Step-by-step explanation:

11 + 4b > 75

4b > 64

b > 16

5 0
3 years ago
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Help help please? i need it
vichka [17]

Answer:

C, $12

Step-by-step explanation:

Every hour worked the employee earns $12. This is a fixed rate and the answer is shown in the 1st slot of the table -- 1 hour = $12

7 0
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The lengths of the sides of a triangle are 11.25 inches, 9.25 inches, and 10.25 inches. What is the perimeter of the triangle?
solong [7]

Perimeter of the triangle is 30.75 inches.

Step-by-step explanation:

  • Step 1: Given sides of the triangle = 11.25 in, 9.25 in, 10.25 in
  • Step 2: Formula for perimeter of triangle = length of sides of the triangle
  • Step 3: Substitute in the formula

Perimeter = 11.25 + 9.25 + 10.25

= 30.75 inches

8 0
3 years ago
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Bumek [7]

Answer: x1 = 10

x2 = 16

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Step-by-step explanation:

8 0
3 years ago
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