Which is the smallest number? O A. 3.2 x 10-9
O B. 2.9 x 103
O C. 7.5x 1046
O D. 4.5 x 101​

A is the answer.

Step-by-step explanation:

3.2 x 10-9 = 23.

All the other answers are more than 23.

A

Step-by-step explanation:

Because if you do 3.2*10= 32

then you subtract 9   32-9= 23

And when you multiply the other, it is already bigger that 23.

Please don't report me. Because I am not sure if you are doing exponent or not. Exponent is 10^3, like that.

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

a

step-by-step explanation: