53 points : ))
round to the nearest tenths

mercury-2.3165 cm
venus - 4.328 cm
earth-6cm
mars-9.116 cm
jupiter- 31.14 cm
saturn- 57.36 cm
uranus-114.84 cm
neptune-179.8 cm

See below

Step-by-step explanation:

Mercury-2.3 cm   The hundreths value isn't greater than 5, so the tenths stays the same.

Venus - 4.3 cm      The hundreths value isn't greater than 5, so the tenths stays the same.

Earth-6 cm            There is no hundreths value so the tenths stays the same.

Mars-9.1 cm           The hundreths value isn't greater than 5, so the tenths stays the same.

Jupiter- 31.1 cm      The hundreths value isn't greater than 5, so the tenths stays the same.

Saturn- 57.4 cm     The hundreths value is greater than 5, so the tenths values is raised by 1.

Uranus-114.9 cm   The hundreths value isn't greater than 5, so the tenths stays the same.

Neptune-179.8 cm  There is no hundreths value so the tenths stays the same.

the answer is 8

step-by-step explanation:

3.14 x 8x8

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.