3 years ago

What is the radius of a sphere which area is equal to the sum of the areas of four circles of radius 7?

Mathematics

1 answer:

antiseptic1488 [7]3 years ago

3 0

Answer:

radius = 7 units

Step-by-step explanation:

Given:

Radius = 7 units

Find area of 4 circles:

1 circle = π (7)² = 49π units²

4 circles = 49π x 4 = 196π units²

Find radius of sphere:

4πr² = 196π

r² = 49

r = 7

You might be interested in

The grocery store sells kumquats for $5.00 a pound and Asian pears for $3.25 a pound. Write an equation in standard form for the

aniked [119]

Okay so your equation is going to be : 18= 5k + 3.25p

3 0

3 years ago

Read 2 more answers

A line passes through the point (5,-11) and has a slope of -2 Find an equation of this line.

Vsevolod [243]

Formula: y = mx + b

m being the slope

Slope given: -2, plug it in

Y = -2x + b

Now find y intercept (b)

Plug in the point (5,-11)

-11 = -2(5) + b

-11 = -10 + b, b = -1

Solution: y = -2x -1

5 0

2 years ago

If a1 = 9 and and an-1 - 5 then find the value of a6.

SCORPION-xisa [38]

Answer:

a1 = 6 and an = an-1 - 5

a2 = a2-1 - 5 = a1 - 5 = 1

a3 = a3-1 - 5 = a2 - 5 = -4, etc

Step-by-step explanation:

8 0

2 years ago

6) -5x - 7y= 11<br> x - 2y=-9

sladkih [1.3K]

Answer:

Please check the attachment.

HOPE U UNDERSTOOD

COMMENT IF ANY DOUBTS

THANK YOU.

3 0

3 years ago

A car slows down at -5.00m/s^2 until it comes to a stop after traveling 15.0m how much time did it take to stop

Kruka [31]

Answer:

4.56 s

Step-by-step explanation:

4 0

3 years ago