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Karolina [17]
3 years ago
15

The temperature was -5 degrees at 5:00 am. After 2 hours, the temperature increased by 39 degrees. What was the temperature at 7

:00 am?
Mathematics
1 answer:
Nesterboy [21]3 years ago
5 0

Answer: 34 degrees

Step-by-step explanation:

The starting temperature was -5 degrees at 5am, and after two hours, the temperature was 34 degrees at 7am. The temperature increased by 39 degrees, how did we get this answer?

You add -5 and 39

-5 + 39 = 34

A tip for adding negatives:

When you get a problem similar to -5 + 39, you can actually flip them around if you need an easier understanding. So it would be 39 - 5. Both equations still equal 34 as long as you keep the values of each number!

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natka813 [3]

ANSWER

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EXPLANATION

The lateral area of a cone is given by:

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where r=10cm is the radius of the circle and l is the slant height.

It was also given that, the lateral area is 400π cm²

We substitute the values to get,

400\pi = \pi  \times \: 10 \times  \: l

We now divide both sides by 10π.

This implies that,

\frac{400 \pi}{10\pi}  = l

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=128

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