Answer:
Step-by-step explanation:

To estimate a square root, find the two perfect squares the number is closest to, then continue with further decimals, i.e. if the question is square root of 5, it is between 4 and 9. As such, the answer is between 2 and 3. Alternatively, use a calculator for a quick estimation of many decimal points.
Answer:
y has the greatest value.
Step-by-step explanation:
1.23w = t
Divide both sides by 1.23.

--- (1)
1.01x = t
Divide both sides by 1.01.

--- (2)
0.99y = t
Divide both sides by 0.99.

--- (3)
From (1), (2) and (3), it is clear that y has the greatest value.
F(x) = 4.25x + 50
for 6 hrs....x = 6
f(6) = 4.25(6) + 50
f(6) = 25.50 + 50
f(6) = 75.50 <==