Write the following value in scientific notation: 0.00000021

2.1 x 10^6

2.1 x 10 ^-6

2.1 x 10^5

2.1 x 10^ - 7

What would be the third step in simplifying the expression 3 + (9 - 5) 2 : 8?

What is a two step equestion

In an experiment involving a toxic substance, the probability that a white mouse will be alive for 10 hours is. 1, the probability that a black mouse will be alive for 10 hours is.

The quotient of 5/31 divided by 15/23, reduced to the lowest fraction, is A. 93/23 or 4 1/23. B. 75/373. C. 115/465. D. 23/93.

How do you subtract 1/4 and 3/8

What is the answer 11+11=4 12+12=9 13+13=?

What is the multiplicative inverse of - 25 24

A $300 suit is on sale for a 30% discount. What is the sale price of the suit?

Tara age is twice saly age. joan is twice tara age, tara is12 years. how old saly age

A rectangle has a perimeter of 76. if the width is five more than twice the length find the width and length