Need multiply. (7.1×10^4)⋅(4.8×10^3) which is the correct answer? a.)3.408×10^7 b.) 3.408×10^8 c.) 3.408×10^12 d.) 3.408×10^13

B

Step-by-step explanation:

No need to panic, it's much more simpler than you think.

10^4 = 10,000

10^3 = 1,000

(7.1 * 10,000) * (4.8 * 1,000) =

(7.1 * 4.8) * (10^3 * 10^4) =

= 34.08 * 10^7

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116