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PtichkaEL [24]
3 years ago
9

A ball-shaped like a sphere has a radius of 2.7 cm. Which measurement is closest to the volume of the ball in cubic cm?

Mathematics
1 answer:
wariber [46]3 years ago
8 0

Answer:

Step-by-step explanation:

V = 4/3 * pi * r^3

V = 4/3 * 22/7 * 2.7^3

V = 82.5 cm^3

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The floor plan for a particular room calls for 17 boards, each 7 feet 7 inches in length. What’s the total length of all the boa
UkoKoshka [18]

7 inches x 17 boards = 119 inches

119 inches / 12 inches per foot = 9 feet 11 inches.

7 feet x 17 boards = 119 feet.

119 feet + 9 feet 11 inches =  128 feet 11 inches

6 0
3 years ago
What is the half-angle of tangent 22.5 (degrees)?
Sergio039 [100]

Find tan (22.5)

Answer: #-1 + sqrt2#

Explanation:

Call tan (22.5) = tan t --> tan 2t = tan 45 = 1

Use trig identity: # tan 2t = (2tan t)/(1 - tan^2 t)# (1)

#tan 2t = 1 = (2tan t)/(1 - tan^2 t)# -->
--> #tan^2 t + 2(tan t) - 1 = 0#
Solve this quadratic equation for tan t.

#D = d^2 = b^2 - 4ac = 4 + 4 = 8# --> #d = +- 2sqrt2#
There are 2 real roots:
tan t = -b/2a +- d/2a = -2/1 + 2sqrt2/2 = - 1 +- sqrt2
Answer:
#tan t = tan (22.5) = - 1 +- sqrt2#
Since tan 22.5 is positive, then take the positive answer:
tan (22.5) = - 1 + sqrt2


6 0
3 years ago
Read 2 more answers
What is the volume of a gift box in the shape of a rectangular prism that is 3.5 inches high, 7 inches long, and 6 inches wide
ankoles [38]

Answer:

147 cubic inches

Step-by-step explanation:

volume of the prism is length x breadth x height

3.5 x 7 x 6=147

8 0
3 years ago
5. Which equation is true when the value of x is -2<br> Helppppp
DENIUS [597]

Answer:

B

Step-by-step explanation:

because 4(x+3)=6x+16 is true

4(-2+3)=6(-2)+16

4(1)= -12+16

4=4

so the equation is true

hope it helped

4 0
3 years ago
The new club sticker is in the shape of a triangle. It has a height of 8 inches and a base of 10 inches. The area of the club st
rusak2 [61]

Answer:

40 square inches.

Step-by-step explanation:

It is given that the new club sticker is in the shape of a triangle.

Height of triangle = 8 inches

Base of triangle = 10 inches

We need to find the area of sticker.

Area of triangle =\dfrac{1}{2}\times base \times height

Substitute base = 10 and height = 8 in the above formula.

Area of triangle =\dfrac{1}{2}\times 10\times 8

Area of triangle =\dfrac{80}{2}

Area of triangle =40

Therefore, the area of the club sticker is 40 square inches.

5 0
3 years ago
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