The amount of simple interest earned i, on an investment over a fixed amount of time is jointly proportional to the principle invested p, and the interest rate a principle investment of $1500.00 with an interest rate of 5% earned $375.00 in simple interest. find the amount of simple interest earned if the principle is $2300.00 and the interest rate is 8%?

$920

Step-by-step explanation:

Since the variation is joint, I=KPr where k is the constant of proportionality.

Plugging in the values of I=$375, P=$1500 and r=5% in the equation I=KPr, the value of k can be calculated. Hence, the formula connecting the three quantities (I,P and r) can be generated.

375 = K (1500×5)

Making k the subject of change,

K = 375/(1500×5)

K=1/20

Formula connecting the three quantities :I =Pr/20

when P=$2300, r=8%,

I = (2300×8)/20

I = $920

c

step-by-step explanation:

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: