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2 years ago

An estimated measurement was guessed of 10.4 mL and the actual measurement was 9.7 mL. What is the percent error?

Mathematics

2 answers:

kifflom [539]2 years ago

7 0

The answer to this question would have to be 13%

Softa [21]2 years ago

4 0

Answer:

7.22%

Step-by-step explanation:

Percent error is determined by dividing the difference between the guessed and the actual, divided by the actual, here you .7 divided by 9.7, which is .07216495, move the decimal two places to the right and round to the nearest hundredth and you get 7.22%

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How many centimeters are in 35 inches? (1 in. = 2.54 cm)

Colt1911 [192]

Answer:

88.90 cm

Step-by-step explanation:

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2 years ago

Find the radius of a circle whose circumference is 31.4 centimeters. Approximate Π as 3.14.

AnnyKZ [126]

Circumference is Diameter * 3.14

so D * 3.14 = 31.4

31.4 / 3.14 = 10 so the diameter is 10.

the radius is half of the diameter so radius = 5 centimeters.

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2 years ago

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A chemist wishes to mix a solution that is 6% acid. She has on hand 14 liters of a 4% acid solution and wishes to add some 10% a

jonny [76]

she should add 7 liters of 10% acid solution

Explanation

Step 1

set the equation:

a) let X represents the amount os solution that is 4% acid

let Y represents the amount os solution that is 10% acid

$\begin{gathered} \frac{4}{100}X+\frac{10}{100}Y=\frac{6}{100}(x+y) \\ \end{gathered}$

if he has 14 liters of 4% acid solution

$x=14$

$\begin{gathered} \frac{4}{100}X+\frac{10}{100}Y=\frac{6}{100}(X+Y) \\ \frac{4}{100}*14+\frac{10}{100}Y=\frac{6}{100}(X+Y) \\ 0.56+0.1Y=0.06(14+Y) \\ 0.56+0.1Y=0.84+0.06Y \\ \end{gathered}$

Step 2

solve the equation :

$\begin{gathered} 0.56+0.1Y=0.84+0.06Y \\ subtract\text{ 0.06Y in both sides} \\ 0.56+0.1Y-0.06Y=0.84+0.06Y-0.06Y \\ 0.56+0.04Y=0.84 \\ subtract\text{ 0.56 in both sides} \\ 0.56+0.04Y-0.56=0.84-0.56 \\ 0.04Y=0.28 \\ divide\text{ both sides by 0.04} \\ \frac{0.04Y}{0.04}=\frac{0.28}{0.04} \\ Y=7 \end{gathered}$

therefore,

she should add 7 liters of 10% acid solution

I hope this helps you

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1 year ago

Brandie lives on the twelfth floor of her apartment building. She walks down 2 flights to visit a friend, then up 3 flights to d

elena55 [62]

B.-1 because she started on the twelfth floor she walks down 2=10 and then back up 3=13 so she has walk down 1 flight to get back.

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2 years ago

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