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12345 [234]
4 years ago
5

Which expressions are equivalent to 4(42)? Select each correct answer. A: 4(40 + 2) B: 4(4 + 2) C: 4(4 + 20) D: 4(20 + 22)

Mathematics
2 answers:
olga2289 [7]4 years ago
8 0
Answer A and D are equivalent to 4(42).
Amiraneli [1.4K]4 years ago
4 0
You do the math in the parenthesis first so for A 40 +2 = 42 becoming 4(42) and D 20 + 22 = 42 becoming 4(42) 
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3 years ago
Ind the approximate increase in its area if its radius increases from mm to mm.​ [Recall that the area of a circle is A​.]
nlexa [21]

Answer:

Increase in area of circle is 263.76 square mm

Step-by-step explanation:

The actual question is

Find the approximate increase in its area if the radius increases from 20 mm to 22 mm.

Solution

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A = \pi r^2

Area of circle of radius 20 mm is

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Area of circle of radius 22 mm is

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7 0
3 years ago
Capital Value An investment produces a perpetual stream of income with a flow rate of
Elodia [21]

Answer:

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Step-by-step explanation:

The capital value is given by

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where R(t) is annual rate

r - annual rate of interest

capital value = \int_{0}^{\infty} 1200 e^{0.03t} e^{-0.07 t} dt

                      = lim at b tend to infinity\int_{0}^{b} 1200 e^{0.03t} dt

                      =lim at b tend to infinity \left [ \frac{1200}{-0.04} e^{-0.04 t} \right ]_0^b

-30,000 { lim at b tend to inifinity(e^{-0.04 b) = e^0]

Asb\rightarrow \infty,  e^{-0.04 b} \rightarrow 0

\int_{0}^{\infty} 1200 e^{0.03t} e^{-0.07 t} dt = -30,000(0 -1) =$30,000

6 0
4 years ago
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is a pair of proportional fraction 
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4 years ago
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Which is the most reasonable estimate for the height of a two-story house 15 centimeters, 15 meters,or 15 kilometers?
Eddi Din [679]
The most reasonable estimate for the height of a two-story house is "15 meters".

The 15 centimeters is not reasonable, it is too small. While the 15 kilometers is not also reasonable since it is too big. Kilometers is used for long distance.
8 0
3 years ago
Read 2 more answers
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