The cost of purchasing a bag of rice is partly constant and partly varies inversely as the square root of the number of people demanding the bag. when the cost was 100 naira the number of people were 36 when the cost was 150 naira the number of people were 144. Find 1. The cost when the number of people were 225.
The number of people when the cost was 200 naira

(a) 160 Naira

(b) Undefined

Step-by-step explanation:

Given

Let:

cost of bag of rice

people demanding the bag

So, we have:

---- The variation

We have:

When:

-- (1)

When:

--- (2)

Subtract (1) from (2)

Multiply through by 12

To solve for x, we have:

-- (1)

This gives:

So, the equation is:

Solving (1): y; when x = 225

We have:

Solving (2): x; when x = 200

We have:

Collect like terms

Cross multiply

x is undefined

215.92 dollars is the answer

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,