Link to the answer is here.
explanation;
A.) 120
The variance is the range of a data set, which shows how spread out numbers are. To get the variance, we take the last number and subtract it from the first number. 160-40=120. Therefore, there is 120 numbers between 40 to 160.
Answer:
45
Step-by-step explanation:
20:15 the ratio can be turned to a fraction
20/15
simplify
4/3
so now add the numerator and the denominator and get 7
then do 105/7=15
and then you do
4x15=60 (Destroyers)
3x15=45 (Battleships)
45 is your answer
<span>3.00 X 10^8 m/s...
so, the light travels 1.08 X 10^12 m/h , 3.00 X 10^5 km/s and
8.33 X 10^7 km/h.
[ 3.00 X 10^8 * 3600 ; (there are 3600 seconds in an hour)
= 10800 X 10^8 m/s
= 1.08 X 10^12 m/h ]
</span>
Firstly you work out 20% of 25 then subtract it.
So 20% of 25 is 5. then you do 25-5 which is 20.