In a science lab, substance X has a mass of 6.10 x 10-7 grams. The mass of substance Y is twice as much as that of substance X. What is the mass, in grams, of substance Y?

A. 1.22 x 10^-5
B. 1.22 x 10^-6
C. 1.22 x 10^-7
D.1.22 x 10^-8

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Astore sells 4 apples for $3 and 3 oranges for $4 if pete buys 12 apples and 12 oranges how much will it cost

Azul has 4 green picks and no orange picks. you add orange picks so that there are 2 orange picks for every 1 green pick. how many picks are there now.