What is the difference of scientific notation. 0.00067 - 2.3 x 10^-5

a. 6.47 x 10⁻⁴

b. 6.47 x 10⁻⁵

c. 4.4 x 10⁻⁵

d. 4.4 x 10¹

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

The height above the ground (in feet) of a ball dropped from the top of a 30-foot-tall building after t seconds is given by the polynomial: ? 16t^2+30 what is the height of the ball after 1/2 second?

Nicholas says that two pairs of congruent angles can be used to show that the two triangles are similar