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EleoNora [17]
2 years ago
6

Write and solve a proportion to answer the question. 36 is 0.9% of what number w? 36/w = .9/100 what is w? w = ?

Mathematics
1 answer:
irakobra [83]2 years ago
5 0

Answer:

4000

Step-by-step explanation:

To solve :

36 = 0.9% of w ; solve for w

36 = 0.9/100 * w

36 = 0.009w

Divide both sides by 0.009

36/0.009 = 0.009w / 0.009

4000 = w

Hence, the number, w equals 4000

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well, 6.2% of 4,300 can't be over half. she has made a calculation error, and the real answer is (this is where the mistake was made) 4,300 * 0.062 (not 6.2, because percents are always divided by 100 to make them into a usable number), which is equal to $266.60.

3 0
3 years ago
Calculate 0.05181 ÷ 3.14 and write your answer
balandron [24]

Given:

0.05181 ÷ 3.14 = 0.0165

i)  0.02

ii) 0.016

iii) 0.0165

<h3>What is a mathematical expression ?</h3>

In mathematics, an expression or mathematical expression is a finite combination of symbols well formed according to context-dependent rules. Mathematical symbols can be used to define numbers (constants), variables, operators, functions, parentheses, punctuation marks, and groupings that help define the order of operations and other aspects of logical syntax.

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5 0
1 year ago
The value of a certain car decreases by 16% each year. What is the 1⁄2-life of the car?
svet-max [94.6K]

Answer:

The half life of the car is 3.98 years.

Step-by-step explanation:

The value of the car after t years is given by the following equation:

V(t) = V(0)(1-r)^{t}

In which V(0) is the initial value and r is the constant decay rate, as a decimal.

The value of a certain car decreases by 16% each year.

This means that r = 0.16

So

V(t) = V(0)(1-r)^{t}

V(t) = V(0)(1-0.16)^{t}

V(t) = V(0)(0.84)^{t}

What is the 1⁄2-life of the car?

This is t for which V(t) = 0.5V(0). So

V(t) = V(0)(0.84)^{t}

0.5V(0) = V(0)(0.84)^{t}

(0.84)^{t} = 0.5

\log{(0.84)^{t}} = \log{0.5}

t\log{0.84} = \log{0.5}

t = \frac{\log{0.5}}{\log{0.84}}

t = 3.98

The half life of the car is 3.98 years.

7 0
3 years ago
WILL MARK BRAINLIEST ANSWER AND EXPLAIN!!--- thank you!!!!
barxatty [35]

Answer:

hmm...i don't know

i got a verryy different answer

Step-by-step explanation:

V = 1/2 (12*8*34)

= 1632 cm^3

8 0
3 years ago
50 points
mixas84 [53]
I believe it’s b I am not sure
Step by step explanation
8 0
3 years ago
Read 2 more answers
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