The number 650,000 written in scientific notation would be

a. 6.5 × 10^-5
b. 6.5 × 10^5
c. 65 × 10^4
d. 0.65 × 10^-6

The answer is B

Step-by-step explanation:

In order to write any number in scientific notation, the proper format in general for scientific notation is:

where "a" is a rational number such that its absolute value has to satisfy:

Also, "b" is the power of 10 required so that the scientific notation is mathematically equivalent to the original number.

We have to follow the next steps to determine the scientific notation of any number:

Finally, the number 650,000 written in scientific notation is:

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