Answer:
C.
Step-by-step explanation:
use the pythogorean theorem a^2 + b^2 = c^2
You are correct with the 1.42 but wrong with the 10^5
Count the digits after the 1, which is 7. So it should be
1.42 x 10^7
Answer:

Step-by-step explanation:
Given

Required
Simplify
Rewrite as:

Take LCM

Apply law of indices

Answer:
f(u) = 9/5
Step-by-step explanation:
u - 5 = -4(u - 1) Distribute on the right side
u - 5 = -4u + 4
+4u +4u Add 4u to both sides
5u - 5 = 4
+ 5 + 5 Add 5 to both sides
5u = 9 Divide both sides by 5
u = 9/5
Answer:
G and E
Step-by-step explanation: