4^1 * 4^2 = 4^(1 + 2) = 4^3 = 64
5^3 * 5^-6 = 5^(3 - 6) = 5^-3 = 1/125
The third one down is rather sneaky. It's also kinda neat.
31 = 32 - 1 = 2^5 - 1
32 * 31
= 32 (2^5 - 1)
= 2^5(2^5 - 1)
= 2^10 - 2^5
= 1024 - 32
= 992
I don't see any math tricks to solve this. Use brute force.
6^5 * 5^-7 = 6^5 / 5^7 = 7776 / 17125 = 0.00953
2. Just pick a couple of questions out of the four above. The last one is a good example for division. The first one would be good for multiplication. I've explained all you need.
Answer:
85%
Step-by-step explanation:
So basically you divide 34 by 40. Which is 85%
If this is your grade, good job!
<u>Answer:</u>
CI = $182.25
<u>Step-by-step explanation:</u>
Compound interest formula:
,
where P is the principal amount ($4000), r is the interest rate (2%), and n is the time period (2 years and 3 months = 2.25 years).
Using formula:
CI =
CI = $182.25
12,176/24 = 1522/3 or 507 1/3
Answer: 10x - 15y because 5(2x) = 10x and 5(-3y) = -15y