1) a square has an area of 36 ft2. what is the perimeter of the square?
2) a circle has a circumference of 16 pie (3.14). what is the area of the circle?

1) 24 feet

Step-by-step explanation:

1) area of a square=a^2

perimeter= 4*a

area=36ft^2=a^2

a=

a=6 feet

perimeter of the square= 4*6=24 feet

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: