Suppose a city with population 900,000 has been growing at a rate of 7% per year. If this rate continues, find the population of this city in 17 years

1,971,000

Step-by-step explanation:

7% increase per year= 7/100 x 900,000

=63000; population will therefore increase by 63,000 per year.

In 17 years, it will have increased by 63,000 × 17 = 1,071,000

Population in 17 years will be current population + increase

=900,000+ 1,071,000

=1,971,000

true? is that what you're asking or do you mean something else?

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.