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Vanyuwa [196]
3 years ago
9

Can someone help me !

Mathematics
1 answer:
larisa86 [58]3 years ago
6 0

Answer:

B

Step-by-step explanation:

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samuel needs to estimate the product of 23 * 395. explain two different methods Samuel can use to estimate.
Sonbull [250]
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.
6 0
3 years ago
Find four consecutive multiples of 5 whose sum is 90
STatiana [176]

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.

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3 years ago
Read 2 more answers
W A field is shaped like the figure shown What is the area of the field Use 3.14 for 8 m
viktelen [127]

Answer: 146.24 square meters

Step-by-step explanation:

4 0
4 years ago
A right circular cylinder has a diameter of 12 in and a height of 12 in. if water is flowing in at the rate of 4π in3 per minute
Readme [11.4K]

The rate of change of the height is \frac{1}{9} 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 = \pi r^{2}h

Rate of change of height is  \frac{dh}{dt} = ?

At any time t,

Volume, V =  \pi r^{2}h

Since r does not change with time, then r is a constant, so,

V =  \pi (6)^{2}h

V = 36\pi h

Differentiate both sides with respect to time t,

\frac{dV}{dt} = 36\pi \frac{dh}{dt} -------------(i)

Since \frac{dV}{dt}is given as 4\pi cu.in. per min,

4\pi  = 36\pi \frac{dh}{dt}

\frac{dh}{dt} = \frac{4\pi }{36\pi }

\frac{dh}{dt} = \frac{1 }{9 } in/min.

Hence, The rate of change of the height is \frac{1}{9} in/min.

To learn more about right circular cylinder from the given link:

brainly.com/question/2762448

#SPJ4

5 0
2 years ago
Superman needs to save lois from the clutches of lex luthor. It take superman 5 seconds to get to Lois who is 210 feet away. Wha
xz_007 [3.2K]

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.

5 0
2 years ago
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