3 years ago

Explain how an estimate helps you to place the decimal point when multiplying 3.9x5.3

1 answer:

Pepsi [2]3 years ago

5 0

When you estimate, you round the decimal up.3.9 rounds up to 4 ,5.3 rounds up to 5.

4 times 5 equals 20.The actual answer is 20.67.

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Nimfa-mama [501]

Given:

A triangle with a base length of 22 ft and a height of 20 ft.

To find:

The area of the given triangle.

Solution:

The area of a triangle is obtained by multiplying $\frac{1}{2}$ with its base length and its height.

The area of a triangle $= \frac{1}{2} (b)(h).$

The height is the distance from the base to the highest point on the triangle and the length of the base is the base length.

The given triangle has a base length of 22 ft and a height of 20 ft.

The area of the triangle $= \frac{1}{2} (b)(h) = \frac{1}{2} (22)(20).$

$\frac{1}{2} (22)(20) = \frac{1}{2} (440) = 220$ ft².

The given triangle has an area of 220 ft².

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