Which answer shows 10.39 written in expanded form?

a.1+0.3+0.9

b. 10+3+0.9

c. 10+0.3+0.09

d. 1+0.3+0.09

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?