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labwork [276]
3 years ago
5

An investment is currently worth 1.2×107 dollars . Twenty years ago, the investment was worth ​ 9.6×105 ​ dollars. How many time

s greater is the value of the investment today than the value of the investment twenty years ago? 0.125 12.5 125 12,500
Mathematics
1 answer:
Pepsi [2]3 years ago
7 0

Answer:

12.5

Step-by-step explanation:

Let an old value be A

and a new value be B

Also, let B is greater than A

The number of times B is greater than A is found by dividing B by A

Now, in terms of scientific notation, how would we do the division? It is shown below:

\frac{a*10^b}{z*10^y}=(\frac{a}{z})*10^{b-y}

Now, coming to our question, let's do the math using the statements and formulas we have seen above:

\frac{1.2*10^7}{9.6*10^5}\\=(\frac{1.2}{9.6})*10^{7-5}\\=0.125*10^2

10^2 means 100, so we do the multiplication:

0.125*10^2\\0.125*100\\12.5

So, it is 12.5 times greater

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A train is traveling at 60 mph. If the rate of speed increases 4 mph each hour,
Alenkasestr [34]

Answer:

B) 5 hours

Step-by-step explanation:

First, find the amount of mph between 60 and 80:

80 - 60

= 20 mph

Since the speed increases 4 mph per hour, we can find how long it will take to get to 80 mph by dividing 20 by 4:

20/4

= 5

So, the correct answer is B, 5 hours

6 0
2 years ago
Which functions could represent a reflection over the y axis of the given function
fredd [130]

Answer:

g(x) = 1/2*(4)^(–x)          and

g(x) =1/2*(1/4)^(x)

Please, see attached picture.

Step-by-step explanation:

Your full question is attached in the picture below

To easily solve this problem, we can graph each equation and see, which one represents a reflection of the function over the y axis.

See, second image.

The answers are

g(x) = 1/2*(4)^(–x)          and

g(x) =1/2*(1/4)^(x)

4 0
3 years ago
What is the area of a rectangle with a length of 88 inches and width of 56 inches?
Alecsey [184]

Answer:

C. 4928 in2

Step-by-step explanation:

88 X 56 = 4928 in2

4 0
3 years ago
Read 2 more answers
When the original amount is less than the new amount, the percent of change is called a(n)
charle [14.2K]
<span>When the original amount is less than the new amount, the percent of change is called a percent of increase. The original amount is smaller than the new amount and this means that the amount has increased in the positive direction I hope that this answer has actually helped you.</span>
5 0
3 years ago
The temperature at 12 am was 44 degrees. The temperature dropped steadily for the next 8 hours to reach the daytime low of 20 de
adelina 88 [10]

Answer:

62 degrees

Step-by-step explanation:

Points (12,440 and (20,20)

Slope = -3

Equation of line: y - 44 = -3(x - 12)

Plug in x = 6 to get y = 62.

6 0
3 years ago
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