A regular pentagon-based pyramid has 5
faces which are equilateral triangles. The
perimeter of its net is 70cm.
What is the perimeter of the base of
the pyramid?

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap

i need more info. are you looked to see there mph? how much they deliver? how far they go?

step-by-step explanation:

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step-by-step explanation:

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.