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3 years ago

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Tim bought $2$2 pounds of apples for $$0.50$$0.50 per pound. He also bought $1.5$1.5 pounds of cookies for $$2.10$$2.10 per poun

d. Tim gave the cashier $$10$$10 for the apples and cookies. How much change did he receive?

1 answer:

seropon [69]3 years ago

5 0

This question is not understandable. Can you rewrite it again please?

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The average speed of greyhound dogs is about 18.4 meters per second. A particular greyhound breeder claims that her dogs are fas

irinina [24]

Answer:

The calculated value Z = 1.183 < 1.96 at 0.05 level of significance

Null hypothesis is accepted

A particular greyhound breeder claims that her dogs are faster than the average greyhound

Step-by-step explanation:

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

Given the average speed of greyhound dogs is about 18.4 meters per second.

Size of the sample 'n' = 35

mean of the sample x⁻ = 18.7

Population standard deviation = 1.5m/s

level of significance (∝) = 0.05

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

Null hypothesis : H₀ : μ = 18.4

Alternative hypothesis H₁ : μ ≠ 18.4

Test statistic

$Z = \frac{x^{-} - mean}{\frac{S.D}{\sqrt{n} } }$

$Z = \frac{18.7-18.4}{\frac{1.5}{\sqrt{35} } }$

Z = 1.183

<u><em>Conclusion:</em></u>-

The calculated value Z = 1.183 < 1.96 at 0.05 level of significance

Null hypothesis is accepted

A particular greyhound breeder claims that her dogs are faster than the average greyhound

8 0

3 years ago

A car traveled 360 miles in 4 hours. If its speed were to be 15 mph slower, how long would it take to travel the same distance?

docker41 [41]

Answer:

4.8 hours

Step-by-step explanation:

First, divide the distance by time to get velocity.

S = D/T

S = 360/4

S = 90 mph

Then, subtract 15 from 90 to get the new speed.

90 - 15 = 75

Lastly divide the distance by the new speed to get time.

T = D/S

T = 360/75

T = 4.8

Therefore, it would take the car 4.8 hours to travel 360 miles at 75 miles per hour.

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3 years ago

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almond37 [142]

Answer:

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Step-by-step explanation:

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2 years ago

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irinina [24]

Answer:

The file contains the solution to the question

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1 year ago

He graph represents part of Brooke's trip to work. During what time period is her speed increasing?

iogann1982 [59]

Her speed is increasing between A) 0 - 10 minutes.

You can see this because the graph line is inclining. Everywhere else it is either staying the same (her speed is neither increasing or decreasing) or declining ( slowing down).

20 - 25 she is decreasing.
10 - 20 she is going the same speed.

5 0

3 years ago