Rewrite 7^-3 using positive exponent

Rewrite 1/7^-3 using positive exponents

Ngrid mixes 3.6 pounds of almonds with some raisins to make a trail mix. she divides the trail mix into 12 equal portions. each portion weighs 0.7 pound. how many pounds of raisins did she use to make the trail mix? express the answer to the nearest tenth.

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap