Find the interest rate. SHOW ALL WORK to receive FULL CREDIT. I=P∙r∙t
Interest earned: $40

Principal: $400

Interest rate: ?

Time: 2 years

Interest rate is: $800

Step-by-step explanation: add 400 + 40 and equal that to 800 basically on how i did it was i used my mathematics calculator and it had 800 on it so yeah hope this help

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: