Standard deviation is the square root of variance. Variance is always a non-negative number, since you can't take the square root of a negative number. So neither can be negative

6 0

3 years ago

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5. A blue whale calf swam from Miami, Florida, to Havana, Cuba, a distance of 228 miles, in 12

kow [346]

The average speed is 97346 feet per hour approximately

Solution:

Given that blue whale calf swam from Miami, Florida, to Havana, Cuba, a distance of 228 miles, in 12 hours 22 minutes

To find: average rate of speed in feet per hour

The speed is given by formula:

$speed = \frac{distance}{time}$

From given information,

$distance = 228 \text{ miles }$

$time = 12 \text { hours } 22 \text{ minutes }$

We know that,

$1 \text{ minute } = \frac{1}{60} \text{ hour}$

Therefore,

$12 \text { hours } 22 \text{ minutes } = 12 + \frac{22}{60} \text{ hour } = 12.3667 \text{ hour }$

Substituting the values in above formula,

$\text { speed }=\frac{228}{12.3667}=18.4366$

Thus average speed is 18.4366 miles per hour

Let us convert to feet per hour

We know that,

1 mile = 5280 feet

Therefore,

18.4366 miles = 18.4366 x 5280 feet = 97345.248 feet

Thus average speed is 97346 feet per hour approximately

6 0

3 years ago

I need help ........

user100 [1]

Your answer would be:

Formula: I = P * r * t
P = Principle $5000
R = Rate 2.5% per year, or in decimal form, 2.5/100 =0.025
T = Time involved 7 years time period
I = Interest

Part A:
P = 5000
R = 2.5%, or .025

Part B: Riley To find the simple interest, we multiply
I = 5000 * 0.025 * 7
T = 7
The Interest is = $875.00

Part C: Investment Balance = Investment + Interest
Usually the interest is added onto the principal t figure out the new amount after 7 years.
= $5000.00 + $875
= $5875.00

Ex. if you borrowed $5000, you would now owed $5875.00

Hope that helps!!!

6 0

4 years ago