Answer:
The second one
Step-by-step explanation:
Thousandths I'm pretty sure
490J
Step-by-step explanation:
Given parameters:
Mass of rock = 5kg
Height of hill = 10m
Unknown:
Potential energy at the hilltop = ?
Solution:
Potential energy is the energy at rest of a body. it is given as:
P.E = mgh
m is the mass of the body
g is the acceleration due to gravity = 9.8m/s²
h is the height of the hilltop
P.E = 5 x 10 x 9.8 = 490J
Learn more:
Potential energy brainly.com/question/10770261
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-(-z + 3) equals z - 3
5 = z - 3
z = 8
If we put that into an equation, we get
(5/9)(f/32)
because "five ninths" is a fraction, "times" is multiplication (which can be represented by parenthesis), "the difference" is division, and "the difference of f and 32" is a fraction.