The formula for a trapezoid relates the area a, the two bases, a and b, and the height, h. a=1/2h(a+b) .solve for b

Step-by-step explanation:

Solving for a specific variable in a formula requires algebra. The formula for area of trapezoid is given as:

We can write this as:

We can multiply the "2" with A to get:

Now we use "distributive property" on the right side of the equation to get [note: distributive property is  a(b+c) = ab + ac ]:

Since we want to solve for b, we keep this term to one side and take others to another and use algebra to come up with an expression for b:

This is solving for b, or the expression for b.

answer: the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.

step-by-step explanation:

the given rate of interest i= 85%

in calculating the monthly payment for a loan with an interest rate compounded monthly, the value of the interest rate per period we use in the formula must be in decimal form.

to convert it in decimal, we divide it by 100, we get

hence, the value should be used for i in the formula of calculation the monthly payment , the interest rate per period is 0.85.