R is inversely proportional to A. R= 12 when A= 1.5
a) Work out the value of R when A = 5.
b) Work out the value of A when R = 9
Pleasee guys

a) R = 3.6

b) A = 2

Step-by-step explanation:

Given that R is inversely to A (R ∝ 1/A) so the formula is R = k/A where k is a constant. So you have to find the value of k first by substituing R and A into the formula :

We have already found the value of k. Next we only have to substitute the following values to find the value of other variable :

6,250

step-by-step explanation:

to get the area, multiply 360 by 160.(57,600)

to find out how many bags of fertilizer it will take, first figure out how many square feet one bag can hold. divide 1000 by 8(125) to get the unit rate(how many square feet one pound of fertilizer can hold)and multiply it by 50(6250). if i haven't made a mistake, that is the answer.