The average fuel consumption of one of the participating cars is 75 liters per 100 km, and the fuel tank capacity is 150 liters. If the refueling pause is counted in the time it takes the driver to complete all stages, what is the minimum number of times the driver recommends stopping to refuel?

10 glasses of juice could be made with 5 carrots, 1,500 orange juice, 2,000 papaya juice.

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.