Write a^3 times a^4 without exponents.

= a⁷

Step-by-step explanation:

add by the exponents. add it's add all together with exponents.

a³⁺a⁴=a⁷

=a⁷ and 7.

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The GCF is 28

Step-by-step explanation:

Step 1:  Find the factors of both numbers

84 → 1,  2 ,  3 ,  4 ,  6 ,  7 ,  12 ,  14 ,  21 ,  28 ,  42 ,  84

56 → 1 ,  2 ,  4 ,  7 ,  8 ,  14 ,  28 ,  56

The factor that is the biggest common in both is the GCF.  We see that 28 is the biggest factor that matches for both numbers.

 The GCF is 28