Answer:
probability that you and your 3 friends will be selected.
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
In this question, the order in which the volunteers are chosen is not important, which means that the combinations formula is used to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.

Desired outcomes:
You and the 3 friends(4 people), from a set of 4. So

Total outcomes:
20 people from a set of 20. So

Probability:

probability that you and your 3 friends will be selected.
Answer:
870 as it is the only number in the list which closest and lesser then 956.
(if you divide, then you get 10 as quotient and 86 as remainder)
we can also take 87 but the question mentions with multiples of 10.
Step-by-step explanation:
Answer:
The answer is incorrect; the plus sign should be a minus sign (apex)
Step-by-step explanation:
For number 1) You need to get m alone, so you must add 4.4 to 2.6.
For number 2) Same thing as #1
For number 3) You must get c alone, you need to divide 10 by 2.5
For number 4) Same as #3
For number 5) You need to get t alone, so you must multiply both sides by 2.5
For number 6) Same as #5