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2 years ago

PLEASE HELP ASAP!! PLEASE

Mathematics

1 answer:

Zolol [24]2 years ago

3 0

Answer:

21 km

Step-by-step explanation:

I am not too sure if i did answer that correctly but the distance should not change even if it is in different directions

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jenyasd209 [6]

Answer:

30 miles

Step-by-step explanation:

Let d represent the distance to the island. The relation between time, speed, and distance is ...

time = distance/speed

so the total time for the round trip is ...

d/15 +d/10 = 5

Multiplying by 30, we get

2d +3d = 150

d = 150/5 = 30

The island was 30 miles from the harbor.

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Answer:

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Step-by-step explanation:

Confidence interval concepts:

A confidence interval has two bounds, a lower bound and an upper bound.

A confidence interval is symmetric, which means that the point estimate used is the mid point between these two bounds, that is, the mean of the two bounds.

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In this question:

Lower bound: 70

Upper bounf: 110

Margin of error:

$M = \frac{110 - 70}{2} = \frac{40}{2} = 20$

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