(6.0 x 10^5) x (3.0 x 10^4)
= 6.0x3.0x10^5x10^4
= 18 x 10^9
= 1.8x10^10
do the others the same way.
multiply the numbers, add the powers of 10.
Then shift the decimal point at the end so the number is between 1 and 10.
Please help me! I do not under stand any of this! I know i should do it on my own. but please help me!!
1.(6.0 x 10^5) x (3.0 x 10^4) = (1 point)
18 x 10^20
18 x 10^9
1.8 x 10^20
1.8 x 10^10
2. (5 x 10^–2) ÷ (2 x 10^3) = (1 point)
2.5 x 10^-5
2.5 x 10^-1
25 x 10^1
25 x 100^2
3. (2.56 x 10^6) x (3.56 x 10^2) = (1 point)
9.1136 x 10^12
91.136 x 10^8
9.1136 x 10^8
91.136 x 10^12
4. In a recent year, the population of California was about 2.52 x 10^7 people. Its land area is about 4.05 x 10^5 km2. What was the average number of people per square kilometer? (1 point)
0.62 x 10^5
6.2 x 10^1
0.62 x 10^14
6.2 x 10^9
*
5. What is the product of (5.1 × 10^3) • (3.2 × 10^3)? (1 point)
16.32 × 10^6
1.632 × 10^7
16.32 × 10^9
1.632 × 10^10
6. What is the product of (7.28 × 10^-2) • (9.1 × 10^-2)? (1 point)
6.6248 × 10^-3
66.248 × 10^-4
6.6248 × 10^4
66.248 × 10^-3
7. What is the quotient of (2.965 × 10^7) ÷ (5 × 10^3)? (1 point)
14.825 × 10^4
5.93 × 10^5
14.825 × 10^5
5.93 × 10^3
8. In a recent year, the world production of wheat was about 5.2 × 10^8 metric tons. Canada produced one over twenty-five of this wheat. About how much wheat did Canada produce? (1 point)
20.8 × 10^8
2.08 × 10^7
2.08 × 10^6
20.8 × 10^7
11 answers
Steve, I tried it that way but i never get the right answer! i'm still so confused.
ok, here are the rest. Looks like some review is in order.
when you multiply, you add powers. when you divide, you subtract powers. so
(5 x 10^–2) ÷ (2 x 10^3)
= 5÷2 x 10^-2 ÷ 10^3
= 2.5 x 10^-5
(2.56 x 10^6) x (3.56 x 10^2)
= 2.56x3.56 x 10^6x10^2
= 9.1136x10^8
population density is people/km^2, so we need to divide:
2.52 x 10^7 ÷ 4.05 x 10^5
= 2.52/4.05 x 10^7÷10^5
= 0.622x10^2
= 6.222x10^1
(5.1 × 10^3) • (3.2 × 10^3)
= 5.1x3.2 x 10^3x10^3
= 16.32x10^6
= 1.632x10^7
(7.28 × 10^-2) • (9.1 × 10^-2)
= 7.28x9.1 x 10^-2x10^-2
= 66.248x10^-4
= 6.6248x10^-3
(2.965 × 10^7) ÷ (5 × 10^3)
= 2.965/5 x 10^7÷10^3
= 0.593x10^4
= 5.93x10^3
5.2 × 10^8 x 1/25
= 5.2/25 x 10^8
= 0.208x10^8
= 2.08x10^7
when you multiply, you add powers. when you divide, you subtract powers. so
(5 x 10^–2) ÷ (2 x 10^3)
= 5÷2 x 10^-2 ÷ 10^3
= 2.5 x 10^-5
(2.56 x 10^6) x (3.56 x 10^2)
= 2.56x3.56 x 10^6x10^2
= 9.1136x10^8
population density is people/km^2, so we need to divide:
2.52 x 10^7 ÷ 4.05 x 10^5
= 2.52/4.05 x 10^7÷10^5
= 0.622x10^2
= 6.222x10^1
(5.1 × 10^3) • (3.2 × 10^3)
= 5.1x3.2 x 10^3x10^3
= 16.32x10^6
= 1.632x10^7
(7.28 × 10^-2) • (9.1 × 10^-2)
= 7.28x9.1 x 10^-2x10^-2
= 66.248x10^-4
= 6.6248x10^-3
(2.965 × 10^7) ÷ (5 × 10^3)
= 2.965/5 x 10^7÷10^3
= 0.593x10^4
= 5.93x10^3
5.2 × 10^8 x 1/25
= 5.2/25 x 10^8
= 0.208x10^8
= 2.08x10^7
Uhhhhhhhhhhhhhhhhhh...
I don't either.
I don't either.
I need help with the population of California one. I know all of the rest.
Steve is 100% right I got a 100
steve is right got 100%
thank you so much steve
The last one was wrong.
Omg! I don't need the answer.. that's cheating. I need help on how to solve it, and I don't know what to flippin do...........
1. D
2 A
3. C
4. B
2 A
3. C
4. B
1 answer