:randall earned the following scores on his math tests: 88,91,89,94,90,64, and 92. what is the mean of his scores? provide your answer accurate to 2 decimal places.

86.86

Step-by-step explanation:

Another word for mean is average.  To find the mean or average, we add up all the numbers and then divide by the number of numbers

There are 7 scores

Mean = (88+91+89+94+90+64+ 92)/7

         = 608/7

         =86.85714286

To 2 decimal places ( we have to round to be accurate to 2 decimal places)

         86.86

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.