MATHEMATICS MIDDLE SCHOOL

Kofi estimated that he would run a total of 10 km in 1 h. In 1 h, he actually ran 46 times around a track 0.25 km long, going a total distance of 11.5 km.What was the percent error in Kofi’s estimate? Round to the nearest tenth of a percent, if necessary.


A.
1.5%

B.
5%

C.
13%

D.
23%

Answers

Answer 1
Answer: The equation to find percent error is

(actual-theoretical)/(theoretical)*100

where actual is the value that actually came out (in this case, 11.5 km) and theoretical is the value that was supposed to come out (in this case, 10 km).  Just plug in the numbers and simplify.

(actual-theoretical)/(theoretical)*100\n\n(11.5-10)/(10)*100=(1.5)/(10)*100=15\%\ error

So, the true answer would be 15%.  Apparently, the question you're asking takes 11.5 as the theoretical and the 10 as the actual (which I personally disagree with)

If you plugged in the numbers that way, the answer comes out to 13.04%.  So, the correct answer for your answer choices is c. 13%

Related Questions

The formula A=6S can be used to find the surface area of a cube that has a side length of X units use the formula to find the surface area of the box 8 1/2 in. • 8 1/2 in. • 8 1/2in.
What is the distance between the points (10, –7) and (10, 9) on the coordinate plane?
Ann needs 42 feet of fabric to make a small quilt. How many yards of fabric should she buy? A. 13 yards B. 14 yards C. 21 yards D. 126 yards
Forty is 25% of what number?
Which system of equations can be used to find the roots of the equation 4x2x2+2x?

If two triangles have equal perimeters, the. They could also have which of the following? equal volumes
equal areas
Equal bases
equal heights

Answers

the answer is equal areas.

Kennedy is building a new L shaped desk for her room she wants to make sure it’s large enough for her supplies the dimensions of the desk in feet are shown in the diagram what is the area of the desk?

Answers

Answer: a

Step-by-step explanation:
Answer: A

Djdjdiwbejedbej

An animal shelter has 9/10 of crates filled with animals.1/2 of the crates are holding dogs . What fraction of total number of crates are holding digs

Answers

Answer: 9/20

Step-by-step explanation:

9/10 is given as the fraction of the crates filled with animals , 1/2 of this fraction holds dog , that is

1/2 of 9/10

= 1/2 x 9/10

= 9/20

Therefore the fraction of the total number of crates holding dog is 9/20
I think it is 9/20 hope this helps

Through: (3,5), slope = 5/3

Answers

the formula is : y = mx + b so m is the slope and b is the y-intercept and now you have : 5 = 5/3(3) + b so you need b so you can say : 
5 = 5/3(3) + b ⇒ 5 = 5 + b ⇒ 5 - 5 = b so b =0 so in this question we dont have any y-intercept so the answer is : y = 5/3x 
but an other formula is : ( y - 5 ) = 5/3 ( x - 3 ) 
but the standard form is gonna be : y - 5/3x = 0  or 3y - 5x = 0 :))
i hope this is helpful 
have a nice day 

State the additive property of zero using the variable b.

Answers

Answer with Step-by-step explanation:

We are given a variable b

We have to state the additive property of zero using the variable b.

Additive property of zero: It states that when any number b is added to zero then we get  sum is equal to number itself.

Mathematical representation:

b+0=0+b=b

Suppose, a number  b=9

Then, 9+0=9

0+9=9

This property is called additive property of zero because when 9 is added to 0 then we get sum equals to 9.

35% of something is 42

Answers

35%=35/100=0.35

0.35x=42
divide both sides by 0.35
x=120

35% of 120 is 42

Answer=120
42 ÷ 0.35 = 120 
~
35% of 120 is 42
Other Questions
Find the equation of the straight line passing through the point (3,5) which is perpendicular to the line y=-3x+2
Evaluate d-(-3.5) when d=2.74
I Am A Number That Is Double The Product Of 2 And 7. One Of My Factors Is 7 What Is My Other factor
the science club sponsor is ordering caps and shirts for the boys and girls in the science club.There are 45 science club members.If the caps come in packages of 3 and the shirts come in packages of 5 what is the least number of packages of caps and shirts that will need to be ordered?