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4 years ago

Explain how you would round 33 and 89 to estimate their sum

1 answer:

5 0

If I'm understanding the question correctly, this is how I would estimate the sum.

I would round each number to the nearest tens place.

33 would be rounded down to 30.

89 would be rounded up to 90.

Then I would do 90+30.

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Find the volume of pyramid with a triangular base. The triangle has a base of 5cm and a height of 14cm. The height of the pyrami

nikitadnepr [17]

Step-by-step explanation:

$a \: = \frac{1}{2} \times 5 \times 4 \\ area \: \:of \: base = 10cm {}^{2} \\ volume \: = \frac{1}{3} \times a \: \times h \\ = \frac{1}{3} \times 10 \times 15 \\ = 50 cm {}^{2}$

5 0

3 years ago

A girl is on the beach and the angle of elevation from her feet to the top of a lighthouse is 62' If the lighthouse is 30ft tall

soldi70 [24.7K]

Answer:

15.95 feets

Step-by-step explanation:

Given that:

Angle of elevation = 62°

Using trigonometric relation :

Tanθ = opposite / Adjacent

From the drawing attached :

Opposite = 30 feets

Distance between girl and lighthouse = d

Tan 62 = 30 / d

1.8807264 * d = 30

d = 30 / 1.8807264

d = 15.951283

d = 15.95 feets

3 0

3 years ago

How many kilometers are in 765 yards? 1 yard = 3 feet 1 mile = 5,280 feet 1 kilometer = 0.621 miles

luda_lava [24]

Answer:

There are 0.70km in 765 yards.

Step-by-step explanation:

This is a problem of conversion of units, that can be solved by multiple rule of three's.

The first step is converting 765 yards to feet. We have that each yard has 3 feet, so

1 yard- 3 feet

765 yards - x feet

x = 765*3

x = 2295

So, in 765 yards there are 2295 feet.

Now, we have to convert 2295 feet to miles. Each mile has 5280 feet, so:

1 miles - 5280 feet

x miles - 2295 feet

5280x = 2295

x = 0.435 miles

So, in 765 yards there are 2295 feet which is 0.435 miles

Now, the final step is converting from miles to kilometers. Each km has 0.621 miles, so:

1km - 0.621 miles

xkm - 0.435 miles

0.621x = 0.435

x = 0.70km

So, there are 0.70km in 765 yards.

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3 years ago

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zvonat [6]

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3 years ago

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valina [46]

Answer:

Step-by-step explanation:

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3 years ago