Answer:
Step-by-step explanation:
1. Calculate the area of the floor
The formula for the area of a trapezoid is
A = ½(a + b)h,
where a and b are the lengths of the parallel sides and h is the distance between them.
However, we are not given the value of h, so we must use Brahmagupta's formula.
If the four sides are a, b, c, and d, the area A is
where s is the semiperimeter
Data:
a = 13 ft
b = 16 ft
c = 13 ft
d = 26 ft
(a) Calculate the semiperimeter
(b) Calculate the area
The area of David's floor is 252 ft².
2. Calculate the number of pieces of material
Answer:
Step-by-step explanation:
Given
Required
The result in standard form
We have:
Remove brackets
Collect like terms
The standard form of a quadratic equation is:
So, we have:
You need 12 square roots of 1764 ?
Why not find the square root of 1764 first (it's 42) and then take 12 of those ?
Answer:
A = P(1 + r)t
Step-by-step explanation:
account balance, to the nearest cent, after: Year 1? Year 2? Year 3? Year 4? ... -To calculate compound interest we use the formula below where A = total balance after t years, P = principal amount (amount borrowed or invested), r = interest ... annually. a) How much money will Jack have after 1 year? b) How much money ...