Answer:

Step-by-step explanation:
Hello!
because if you multiply numbers with exponents you add the exponents.
Now we've got
.
Sadly it has to be in exponential form. You can substitute
into the equation if you know a.
Answer:
If it's a rectangle, then:
12 x 6 = 72 cm²
Step-by-step explanation:
Answer:
b. 7+21
Step-by-step explanation:
If you do 1+3=4 and then 4 times 7 that equals 28. When you do 7+21 that equals 28 too. So b is the answer
Answer:
75%
Step-by-step explanation:
9 ÷ 12 = 0.75
0.75 x 100 = 75 = 75%