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alina1380 [7]
3 years ago
8

I’ve already started it but need to know how to do to see if I’m doing it right

Mathematics
1 answer:
Leni [432]3 years ago
8 0
(a) put in t = 3 into the r(t) equation provided. Answer will be in gigameters

(b) Use the value of r(t) found in part (a) in the surface area of a sphere equation. S = 4(pi)r² Answer, S will be in units Gm²

(c) This is saying put the equation r(t) into the equation S(r) to make a new equation S(t) or h(t) as they put it.
h(t) = 4(pi)(1.36t + 0.002)²

(d) Put t = 3 into the new equation. Answer will agree with b
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Help...............................
nadezda [96]
The answer is 25 grams.
5 0
3 years ago
The following proof shows an equivalent system of equations created from another system of equations. Fill in the missing reason
aev [14]

Answer:

Equation 2 of system  divided by 2 on both sides then we get second equation of system 2.

Step-by-step explanation:

We are given two equations

2x+2y=14

-4x+6y=12

We are given a proof which shows an equivalent system of equations created from another system of equations

We have to fill the correct reason in the blank space

Statement:2x=2y=14

-4x+6y=12

Reason: Given

Statement :2x=2y=14

-2x+3y=6

Reason : equation 2 of system I divided by 2 on both sides then we get second equation of system 2.

When we divide by 2 then the solution does not change and x and y - intercepts are not change.So, the two systems are equivalent.

3 0
3 years ago
James deposited $575 into a bank account that earned 5.5% simple interest each year.
Leona [35]
575* 0.05 = 28.75
28.75* 2.5(yrs) = 71.875
575+ 71.875 = 646.875
therefore, $646.87
5 0
3 years ago
I WILL MARK BRAINIEST
kozerog [31]

Answer:parallel

Step-by-step explanation:

8 0
2 years ago
What percent of 25 is 12? Enter your answer in the box.
stiks02 [169]

Answer:

12 is 25 percent of 48.

Step-by-step explanation:

To find the solution to this problem, you'll first want to convert the word problem to an equation. We can find key words in the word problem that will give us information about what we're doing and change the percentage into a decimal since both are ways to write numbers less than 1.

If we know that the word 'of' means we should multiply, we can write the equation like this:

12 = .25 * x

where x is the mystery number we are trying to find. Divide both sides by .25 to get x by itself (since any number divided by itself equals 1).

12 / .25 = .25 / .25 * x


12 / .25 = x


48 = x

To check our work, if you know that 25% is one quarter (1/4) of a whole, we can multiply 12 by 4 to find our whole.

12 * 4 = 48

5 0
3 years ago
Read 2 more answers
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