Answer:
624
Step-by-step explanation:
Answer:
the explicit formula for h(n) is, -65-10n
Step-by-step explanation:
Given that:
h(1) = -75
h(n) = h(n-1)-10 ......[1]
Put n =2 in [1] we have;

Similarly for n = 3
and so on...
The series we get;

This is an arithmetic sequence series with common difference(d) = -10
Since,
-85-(-75) = -85+75 = -10,
-95-(-85) = -95+85 = -10 and so on
First term(a) = -75
the Explicit formula for arithmetic sequence is given by:

where a is the first term,
d is the common difference and
n is the number of terms.
We have to find the explicit formula for h(n);

Substitute the given values we have;

or

Therefore, the explicit formula for h(n) is, -65-10n
You would add all the sides together
He must read 13 pages or more, because 13*2=26. 26+4=30. This is your answer, and I hope it helps.
Answer:
Depends on amount of students.
Step-by-step explanation:
You would just multiply the amount of students time (1 1/2) = (1.5)
Ex:
3 students 4 1/2 hours
4 students 6 hours
5 students 7 1/2 hours
and so on