Answer:
??????????????
Step-by-step explanation:
sorry di ko po alam godbless po
Answer:
The minimum cost is $17.30c
Step-by-step explanation:
Given
--- Volume
--- cost of wall paint
---cost of ceiling paint
Required
Minimum cost of paint
The volume is calculated as:
Substitute 288 for V
Make z the subject
The surface area is calculated as:
Because xy represent the dimension of the ceiling and the opposite of the ceiling (the floor) will not be painted. Hence, it does not require a coefficient of 2
The cost is:
Substitute
Differentiate w.r.t x and y
By comparison:
Set them equal to 0
Substitute x for y
Cross multiply
Take the cube root of both sides
Substitute 6 for x and for y in
--- approximated
Answer: always
Step-by-step explanation:
Complete Question
Kelvin finished 2/3 of his test in a 1/2 hour. Express this rate in hours per test.
Answer:
3/4 hours per test
Step-by-step explanation:
2/3 of his test = 1/2 hour
This rate in hours per test is calculated as:
x = 1/2 /2/3
x = 1/2 hour ÷ 2/3 test
x = 1/2 × 3/2
x = 3/4 hours per test
This rate in hours per test is given as 3/4 hours per test