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Ymorist [56]
3 years ago
5

Use scientific notation to estimate the number of inches in 1,225 miles.

Mathematics
1 answer:
Zolol [24]3 years ago
6 0
In scientific notation, to obtain the original whole number. Move the decimal to the left if the exponent is negative and to the right if the exponent is positive.
So 1 inch = .00001578 miles
1225 / .00001578 = 77629911.28

To obtain the answer in scientific notation, move the decimal to the left until you have a single digit whole number and the rest of teh digits are to the right of the decimal. In this case 7 places. Now show it multiplied by 10 to an exponent equal to the number of places you moved the decimal. In this case the 7th exponent.

7.763 x 10^7
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Please solve the table correctly.
Hitman42 [59]

Answer:

See below.

Step-by-step explanation:

No. Triangles       Perimeter

 1                                  14

2                                  18

3                                  22

We see from the table, after the first  perimeter  (= 14),  with  each increase of 1 in the number of triangles,  the perimeter increases by 4.

As an equation it is  P = 14 + 4(n - 1)  where P = perimeter and n = number of triangles.

4 0
3 years ago
Chris’s new car gets 42 miles per gallon. What is the equation that represents y, the total miles driven on x gallons of gas?
Fantom [35]

Answer: I think the answer is B

Step-By-Step Explination:

First you find out what x is by doing 42 multiplying it by 0.1 witch equals 4.2 gallons per mile

Next you figure out what y is by doing 4.2y (witch is 4.2 times y)

4 0
3 years ago
the average u.s. citizen throws away about 1,606 lb of trash each year. find this rate in pounds per month, to the nearest tenth
erik [133]

Answer:

The average U.S. citizen throws away about 133.8 pounds of garbage a month.

Step-by-step explanation:

First take the total amount of trash thrown away in a year (1,606), and divide it by the number of months in a year (12).

1,606 / 12 = 133.833333

You would get 133.833333 and would round it to the nearest tenth and get 133.8.

8 0
3 years ago
Read 2 more answers
I think I have the answer, but would like to check my work
notsponge [240]

Notice that we can calculate the area of the square and the rectangle separately to get the following:

\begin{gathered} A_1=3\cdot3=9in^2 \\ A_2=9\cdot2=18in^2 \\ \Rightarrow A=A_1+A_2=9+18=27in^2 \end{gathered}

therefore, the total area is 27 in^2

4 0
1 year ago
Madeline bought a new coat at a 20% off sale. She save $27. What was the original price of the coat?
kompoz [17]

Let, the original price = x

x*20 /100 = 27

x = 2700/20 = 135

Original price was $135
8 0
3 years ago
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