A bag of grass seed weighs 7 pounds and covers 2800 square feet. If marks backyard is 6000 square feet, how many pounds of grass seed will he need?

15

Step-by-step explanation:

Take x as how many pounds you need for the 6000 square feet

7 pounds                                x pounds

---------------                           -----------------------

2800 square feet                    6000 square feet

7*6000=42000

42000/2800=15

or you could find how many pounds you would need for 1 square feet.

7 pounds                              .0025 ponds

----------------                        -----------------------

2800 square feet               1 square feet

and then you could just multiply .0025 and 6000

so = 15

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.

answer: yes, since the line has a steeper rate of change than the exponential the y-values will be greater and they will only intersect one time.