Answer:
Her income increase by 27.5% from 2004 to 2007
Step-by-step explanation:
Step 1 : Kieya's income in 2004 was $40,000
Step 2 : Kieya's income in 2007 was $51,000
Step 3 : Calculate difference in $
Income in 2007 - Income in 2004 = Increase (+ve) or decrease (-ve) in income
51000 - 40000 = 11000 increase in income
Step 4 : Calculate difference in terms of percentage
<u>Income of 2007-Income of 2004</u> x 100
Income of 2004
<u>51000-40000</u> x 100
40000
= 0.275 x 100
= 27.5 %
!!
<span> (a) if 1 woman is randomly selected, find the probability that her height is less than 64 in
using z-score formula:
z-score=(x-mu)/sig
(64-63.5)/2.8
=0.18
thus
P(x<64)=P(z<0.18)-=0.5714
B] </span><span> if 33 women are randomly selected, find the probability that they have a mean height less than 64 in
using the central limit theorem of sample means, we shall have:
2.8/</span>√33=0.49
since n>30 we use z-distribtuion
z(64)=(64-63.5)/0.49=1.191
The
P(x_bar<64)=P(x<1.191)=0.8830
Answer:
<h2>
The volume of the pyramid would be 4500 cm³.</h2>
Step-by-step explanation:
Formulas you would be using:
Volume of a pyramid: b = base, h = height
Area of a trapezoid: a = base₁ , b = base₂ , h = height
First, we're going to find the area of the trapezoid, which is the base of the pyramid.
We are given that a = 20, b = 30, h = 20
Plug it in:
= 500 cm²
Now that we have found the base of the pyramid, we can plug it in along with the height of the pyramid.
= 4500 cm³
Hope this helps :D