Samuel could round both of the individual numbers, to get s rounded answer. So, he could round 23 to 20, and 395 to 400, to get a product of 8000.
Or, he could multiply the numbers first, so 23*395 to get a product of 9085, which would then round to 9000, or depends on what place value it would want to be rounded to.
Answer:
15, 20, 25, 30
Step-by-step explanation:
If want to find the first multiple, we could actually use the equation: x + (x+5) + (x+5+5) + (x+5+5+5) = 90. After simplifying this term, we would get 4x+30 = 90 which then transforms into 4x=60 which simplifys to x = 15. Plug 15 into the original equation, and you would get the multiples 15 + 20 + 25 + 30 = 90.
Answer: 146.24 square meters
Step-by-step explanation:
The rate of change of the height is 
in/min.
<h3>What is a right circular cylinder?</h3>
A right circular cylinder is a cylinder that has a closed circular surface having two parallel bases on both the ends and whose elements are perpendicular to its base. It is also called a right cylinder.
Volume of the cylinder = 
Rate of change of height is 
= ?
At any time t,
Volume, V =
Since r does not change with time, then r is a constant, so,
V = 
V = 
Differentiate both sides with respect to time t,
-------------(i)
Since 
is given as 4
cu.in. per min,
in/min.
Hence, The rate of change of the height is in/min.
To learn more about right circular cylinder from the given link:
brainly.com/question/2762448
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Answer:
42 ft/s
Step-by-step explanation:
if superman travels 210 feet in 5 seconds, he will travel a fifth of 210 ft in 1 second
a fifth of 210ft is 210/5=42
hence 42ft/s is his rate.
