Hat's the circumference of a circle with a diameter of 45 centimeters? a. 141.4 centimeters b. 6,361.7 centimeters c. 282.7 centimeters d. 70.7 centimeters

By definition, the circumference of a circle is given by:

Where "d" represents the diameter of the circle.

Then, replacing:

Thus, the circumference of the circle of diameter 45cm, is given by:

Option A

answer: the two figures are congruent.

step-by-step explanation: they're congruent because figure efgh is reflected across the x and y axis but it was also rotated.

hope it !

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.