The answer is 24km per hour IM 100% SURE
Answer:
sinθ=√7/4
Step-by-step explanation:
Here,
cosθ=3/4
b/h=3/4
b=3 and h=4
Using Pythagoras theorem,
h²=p²+b²
4²=p²+3²
16-9=p²
p=√7
Now,
sinθ=√7/4
Answer:
Perimeter of circular garden=500m
Area=19,894 sq m
Step-by-step explanation:
250x4=1000
1000/2=500m circle perimeter
Pi x Dia=Circumference
3.14159 x Dia=500m
Dia=159.16m
Rad=159.16/2=79.58m
Area=Pi x Rad^2=2.14159 x 79.58^2=19,894 m^2
Answer:
By 71 years of age 80% of the plan participants have passed away.
Step-by-step explanation:
Normal Probability Distribution
Problems of normal distributions can be solved using the z-score formula.
In a set with mean and standard deviation , the z-score of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Mean of 68 years and a standard deviation of 4 years.
This means that
By what age have 80% of the plan participants passed away?
By the 80th percentile of ages, which is X when Z has a p-value of 0.8, so X when Z = 0.84.
By 71 years of age 80% of the plan participants have passed away.
Answer:
438.25
Step-by-step explanation:
A=2 π r h+2 π r^2=2×π×4.5×11+2×π×4.5^2≈438.25218