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2 years ago

I need help plz 10 points

Mathematics

1 answer:

Vaselesa [24]2 years ago

5 0

Answer:

87.9

Step-by-step explanation:

$\pi {2}^{2} \times 2 + 2\pi \times 2 \times 5 = 28\pi = 87.9$

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What is the volume of the figure below if a = 4.3 units, b = 5.3 units, and c = 3 units?

marishachu [46]

a x a x c = 3.9 * 3.9 * 3 =45.6345.63 * 2 = 91.26a x b x c = 3.9 * 5.7 * 3 = 66.6966.69 + 91.26 = 157.95 cubic units

4 0

2 years ago

You and another person are sunbathing on the beach near a lifeguard station. The other person chooses a spot that is the same di

Schach [20]

Answer: 26.8 feet

Step-by-step explanation:

In the figure attached you can see two right triangles triangle ABD and a triangle ACD.

You are located at point B and the other person at point C.

The approximate height of the lifeguard station is x.

Keep on mind that:

$tan\alpha=\frac{opposite}{adjacent}$

Therefore:

For the triangle ABD:

$tan(36\°)=\frac{x}{DC+11}$ [EQUATION 1]

For the triangle ACD:

$tan(46\°)=\frac{x}{DC}$ [EQUATION 2]

Solve from DC from [EQUATION 2]:

$DC=\frac{x}{tan(46\°)}$

Substitute into [EQUATION 1] and solve for x:

$tan(36\°)=\frac{x}{(\frac{x}{tan(46\°)}+11)}\\tan(36\°)(\frac{x}{tan(46\°)}+11)=x\\11*tan(36\°)=x-\frac{xtan(36\°)}{tan(46\°)}\\7.991=0.298x$

$x=26.81ft$ ≈26.8ft

7 0

2 years ago

Find the volume of the cone

Alik [6]

Volume =

1 πr2h

1 ×π×42×7

= 117.28612573402 centimeters^3

3 0

2 years ago

I mark as brainliest i promise

Nataly_w [17]

Answer:

32 units

Step-by-step explanation:

2 x 4 x 4 = 32

you mulyiply the height the width and the length

5 0

2 years ago

Read 2 more answers

What is the vertex of the parabola 1. (-1,0) 2. (0,-3) 3. (1,-4) 4. (3,0)

larisa [96]

The answer is (1,-4)
Remember that the vertex is the center of the parabola.

3 0

2 years ago