21pts!

In this investigation, you will be estimating the values of √40, √75, √90, √245, √450, √640 and √675 to the nearest hundredths place. Be sure to use at least two module vocabulary words in your responses.

1. Describe clearly what strategy you plan to use to estimate these values.

2. Estimate the values to the nearest hundredth and show or briefly describe your work. (refer to pic below)

3. Reflect on the calculations you made. What general methods or short cuts did you find to make the calculations easier as you did each calculation?

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

what i would say the best answer is a. 40.5

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.

arc length = 6.63311 ft.

step-by-step explanation:

the formula the arc measure is:

arc length s=2πr(c)/360

where:

c   is the central angle of the arc in degrees

r   is the radius of the arc

π   is pi, approximately 3.142

using the above formula we get

s =

thus we find that arc length of an arc for a circle of radius 20 feet and central angle 19 degrees is

6.63311 feet