This expression<span> can be written in a shorter way </span>using <span>something called </span>exponents<span>. An </span>expression<span> that represents repeated multiplication of the same factor is called a power.</span>The number<span> 5 is called the base, and </span>the number<span> 2 is called the </span>exponent<span>. For example </span>
Answer:
Here are your answers! :)
Step-by-step explanation:
15) -21
16) -11
17) 26
18) 23
19) -32
20) -20
21) 65
22) 420
23) 16
24) -13
25) 20
(I hope this helps!!)
Note that
- 12=2·2·<u>3</u>;
- 20=2·2·5;
- 36=2·2·<u>3</u>·3.
The common factors of these three numbers are 2, 2. Also numbers 12 and 36 have one more common factor <u>3</u>, then the least common multiple is
LCM(12,20,36)=2·2·<u>3</u>·5·3=180 sec=3 min (here first you write all common factors between all three numbers, then between two numbers and at last all remaining factors).
Answer: all three experiments will need to be checked after 3 minutes passed, then after 6 minutes passed, then after 9 minutes passed and so on.
