HELP I HAVE TO FINISH IN 2 HOURS shannon and sarah are mowing a field. shannon can finish mowing by herself in 2 hours. sarah can finish in 4 hours. how long will it take them to mow the field together?

1h 20m

Step-by-step explanation:

Let the total amount of work be x.

Shannon:

2h = x

1h = x

So basically Shannon does  x work per hour.

Sarah:

4h = x

1h = x

So basically Sarah does x work per hour.

Together:

1h = x + x

    = x + x

    = x

Amount of time spent = x ÷ x

                                     = x × x

                                     = h

                                     = 1h

                                     = 1h 20m

1696 hundred thousand

step-by-step explanation:

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.