I got 5 times 45 because I multiplied by 5 to get my answer.
Answer:
i dont either
Step-by-step explanation:
Answer:
1 1/3 hours
Step-by-step explanation:
Pipe 1 alone:
fills the pool in 2 hours
in 1 hour, it fills 1/2 of the pool
Pipe 2 alone:
fills the pool in 4 hours
in 1 hour, it fills 1/4 of the pool
Pipe 1 and Pipe 2 working together:
fill the pool in x hours
in 1 hour, they fill 1/x of the pool
Working together, in 1 hour the two pipes fill 1/2 + 1/4 of the pool.
Working together, in 1 hour the two pipes fill 1/x of the pool.
Therefore,
1/2 + 1/4 = 1/x
2/4 + 1/4 = 1/x
3/4 = 1/x
x = 4/3
x = 1 1/3
Answer: 1 1/3 hours
She can paint 14 statues.
To find this answer, we just need to divide the amount of paint left by the amount of paint per statue.
7/8 divided by 1/16 is 14. To divide fractions remember it is easier to multiply by the reciprocal.
Let
and
be the sides of the rectangle. The perimeter is given to be 500m, so we are maximizing the area function
subject to the constraint
.
From the constraint, we find
so we can write the area function independently of
:
Differentiating and setting equal to zero, we find one critical point:
which means
, so in fact the largest area is achieved with a square fence that surrounds an area of
.