Answer:
Given,
A=90
b=15
A=12bh
Now,
Step-by-step explanation:
Put the given value in the formula
A=12bh
90=12*15*h
90=180h
90/180=h
Hence, h=0.5
Irrational numbers don't end
they can't be written in form a/b
obvoisly, 58.25 ends and it can be written as 58.25/1
(repeating decimals can be written in a/b form, it just takes work to find)
false, 58.25 is NOT irrational
Answer:
C. Julie drive 15.5 miles from her home to the grocery store. Julie drives the same path going back home. What is x, the total amount of miles traveled to the grocery store and back home?
Step-by-step explanation:
The situation in the 3rd option represents the equation, 15.5 = x/2.
Distance driven by Julie to the grocery store = 15.5 miles
Distance driven by Julie back home following the same path = 15.5 miles
Total amount of miles travelled to and fro the store, x, = 2*15.5
This means, the mile's covered going to the store or coming back home can be expressed as ½ the total amount of miles, x, covered. Which is: 15.5 = ½x
Therefore, the third option represents the equation, 15.5 = x/2.
Answer:
A sample of 1032 is needed.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
The margin of error is:
A sample of 300 components showed that 20 were defective.
This means that 
99% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
How large a sample is needed to estimate the true proportion of defective components to within 2.5 percentage points with 99% confidence?
A sample of n is needed.
n is found when M = 0.025. So
Rounding up
A sample of 1032 is needed.
3.5 days!
Just because they work together, it doesn't mean they'll work twice as fast!
Find the average of the two by adding 3 and 4 to get 7 and then divide by 2 to get 3 and a half hour.
I think. xD This is kind of tricky.
