Number of exams per semester = 5
Average of first four exams = 90

Therefore,
Total of first four exams = 90*4 = 360 marks

Based on 5 exams,

Average = 360/5 = 72

6 0

4 years ago

The online price for a box of hair clips is $2.60. For any number of boxes purchased, the cost of shipping is $12. The equation

stepan [7]

Answer:

Step-by-step explanation:

Step one:

given data

the total cost function is

c=2.60b + 12

Step two:

Required is c, when b= 12

substitute b=12 we have

c=2.60(12) + 12

c=31.2+ 12

c=43.2

the total cost = $43.2

7 0

3 years ago

Francisco has a savings account balance of 2,033.88. The interest rate on the account is 2.9% compounded monthly. If he opened t

inna [77]

Let P = the value of the initial deposit.

Given:
A = 2,033.88, the current amount
r = 2.9% = 0.029, interest rate
n = 12, compounding interval
t = 9 years

Then
$A=P(1+ \frac{r}{n})^{nt}$

That is,
P(1 + 0.029/12)¹⁰⁸ = 2203.88
1.2978P = 2203.88
P = $1,698.17

Answer: $1,698.17

4 0

3 years ago