# Teachers at price middle school are planning a birthday party for the principal planners estimated that 42 slices of cake would be needed. In fact only 30 slices of cake were eating what was the error in estimate of how mucj cake was eaten ?

E = 12

RE = 0.4

Step-by-step explanation:

The estimation error (E) is defined as the absolute value of the difference between the actual value (RV) and the estimated value (EV). With RV = 30 and EV = 42.

E = | EV - RV | = | 42 - 32 | = | 12 | = 12

A complementary concept could be the relative error (RE), which is defined as the ratio between the absolute error and the actual value.

RE = E / RV = 12/30 = 2/5 = 0.4

error=42-30=12
if want percent error

percent error=error/original times 100=12/30 times 100=40% error

the error is 12

## Related Questions

Find the following bases. a. 8% of ? = 20
b. 75% of ? = 30
c. 20% of ? = 45
d. 150% of ? = 36

It is pretty easy.

a. 250

b. 40

c. 225

d. 24

Step-by-step explanation:

What is 49.32 of the 2nd 10 power

Given that α and 2α are the roots of the quadratic equation x² + kx + 18 = 0 find the values ​​of k Hi please help me solve this

The values of 'k' are -9 or 9

Step-by-step explanation:

Given:

The quadratic equation is given as:

The roots of the equation are .

Now, we know that, for a quadratic equation of the form

The sum of roots =

Product of roots =

Now, for the given quadratic equation, we have:

Therefore, using the sum of roots, we get:

Now, using product of roots, we get:

Now, plug in the values of in equation (1). This gives,

Hence, the values of 'k' are -9 or 9

Sphere A has a radius of 24 centimeters, and sphere B has a diameter of 42 centimeters. The radius of sphere A is multiplied by what factor to produce the radius of sphere B? 4/7
7/8
8/7
7/4

7/8

Step-by-step explanation:

Sphere A has a radius of 24 centimeters, and sphere B has a diameter of 42 centimeters.

WE need find which factor is multiplied with radius of sphere A to produce the radius of sphere B

Diameter of sphere B is 42

Radius of sphere B = 21

24 * x= 21

Divide by 24 on both sides

x= 21/ 24

divide top and bottom by 3

x= 7/ 8

Step-by-step explanation:

Ok, we know that Sphere A as a radius of 24 cm, and sphere B has a diameter of 42 cm.

We want to find the factor which multiplied by the radius of sphere A gives us the radius of sphere B.

First, let's find the radius of sphere B.

We know that Diameter = 2*Radius.

So the radius of sphere B is equal to the diamater divided by 2.

rB = 42cm/2 = 21cm

now, let's find the number x that:

24cm*x = 21cm

x= 21cm/24cm = 21/24

now, we can divide numerator and denominator by the same number, in this case 3, and get:

x = 21/24 = (21/3)/(24/3) = 7/8

x = 7/8

So the factor is x= 7/8, the second option.