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Pavlova-9 [17]
3 years ago
14

What is area of circle

Mathematics
1 answer:
givi [52]3 years ago
3 0

Area of circle = (pi) x (radius of circle)²


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The volume of a sphere is 2145 cubic centimeters. What is the approximate diameter of this sphere?
eimsori [14]

Answer:

d = 2(40.11 cm) = 80.22 cm

Step-by-step explanation:

The formula for volume of a sphere is V = (4/3)πr³

and here V = (4/3)πr³ = 2145 cm³

Let's simplify this equation by multiplying both sides by (3/4); this will cause (4/3) to disappear:

(3/4)(4/3)πr³ = (3/4)2145 cm³, or

                 r³ = 1608.75 cm³

Taking the cube root of both sides, we get:

                  r = 40.11 cm

Remembering that diameter = 2 times radius, we calculate the diameter:

                  d = 2(40.11 cm) = 80.22 cm

6 0
4 years ago
(6x to the second power +7x) + (5-2 to the second power +9x) please help
lidiya [134]

Answer:

4x^2+16x+5

Step-by-step explanation:

(6x^2+7x)+(5-2x^2+9x)

6x^2-2x^2+7x+9x+5

4x^2+16x+5

7 0
3 years ago
Enter your answer and show all the steps that you use to solve this problem in the space provided.
Greeley [361]

Answer:

The steps are below. Thanks.

Step-by-step explanation:

Equation= 0.6(1)+0.8=1.4

1. Calculate the product. Any expression multiplied by 1 remains the same.

  • 0.6×1+0.8 to 0.6+0.8

2. Calculate. Add the numbers.

  • 0.6+0.8 to 1.4

3. Answer found!

  • 1.4

Alternative Form of the final answer 1.4 could be: 7/5 or 1 2/5.

Hope this helps and if you could mark me as brainliest. Thanks!

7 0
3 years ago
Mr. Foster is starting a new job. His salary for the first year is $30,000. He will receive a 5% raise each year after that. Wri
stira [4]

Answer:

s= 30000+1500x

Step-by-step explanation:

Given data

Le the number of years be x

His salary for the first year is $30,000

5% of $30,000

=5/100*30000

= 0.05*30000

= $1500

Hence for x years the salary can be described as

s= 30000+1500x

6 0
3 years ago
What is the measure of 25 degrees complementary angle
nataly862011 [7]

Answer:

If the complement of an angle is 25 degrees, then the measurement of the angle will be 65 degrees

Step-by-step explanation:

5 0
3 years ago
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