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3 years ago

Find the surface area of a sphere with a radius of 30 m. leave your answer in terms of pi @Directrix

2 answers:

5 0

The formula for surface area of a sphere: A = 4 pi r^2.
Since the radius is 30 m then A = 4pi30^2.
30^2 x 4 =3600
A=3600pi m

-BARSIC- [3]3 years ago

4 0

The answer is 3600 pi

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Analyze Corey’s work to find his error. What is Corey’s mistake? He substituted 80 for x instead of y. He should have added 88.2

Anni [7]

x is the temperature and y is the number of swimmers. If there are 80 swimmers, then y = 80 instead of x = 80

This is how Corey should have solved

y = 1.505*x - 88.21

80 = 1.505*x - 88.21 <--- replace y with 80

1.505*x - 88.21 = 80

1.505*x = 80 + 88.21 <--- add 88.21 to both sides

1.505*x = 168.21

x = 168.21/1.505 <--- divide both sides by 1.505

x = 111.767

x = 111.8

If there are 80 swimmers at the pool, then the possible outside temperature is roughly 111.8 degrees F. This temperature seems awfully large, so it's possible that Corey's regression equation has limited scope; in other words, it isn't too useful if x is outside a given interval

<h2> IF YOU DONOT WANT TO READ SO MUCH THEN </h2>

PLEASE SEE THE ATTACHMENT 

4 0

3 years ago

(x+2) / 9 = 5 Quick question First good answer, brainliest

Zigmanuir [339]

you basically want to get x on it's own to find out what it equals so,

multiply both sides by 9:

x+2 = 45

take away 2 from both sides:

x = 43

8 0

3 years ago

Read 2 more answers

Is 3/7 and 7/3 the same on the number length in the fraction line?

Artemon [7]

No 7/3 is equal to 2 1/3 while 3/7 is 3/7 (less than 1)

8 0

3 years ago

What is ( 3.1 x 10^5) ( 2.2 x 10^7) in scientific notation?

hjlf

Answer:

= 2.231 × 107

8 0

3 years ago

Help please with math

Mashutka [201]

Answer:

If they want irregular fractions its

1= 14/4 . 2= 11/2 3= 14/8

4= 21/4 . 5= 27/6 . 6= 125/13

7= 61/9 . 8= 69/9 . 9= 84/8

If they just want the few simplified then

1= 3 1/2

3= 1 3/4

5= 4 1/2

8= 7 2/3

9= 10 1/2

Step-by-step explanation:

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3 years ago