Answer:
7. (7^2)(4^2) or 49 * 16
8.18^5
Step-by-step explanation:
7. You can do that or simplify the exponents.
8. When dividing two exponents you can subtract the exponentes. *(note i didn't simplify 18^5 because it said expression, and a simplified number is not an expression.)
Answer:

Step-by-step explanation:
[Most of the work here comes from manipulating the trig to make the term (integrand) integrable.]
Recall that we can express the squared trig functions in terms of cos(2x). That is,

And so inverting these,
.
Multiply them together to obtain an equivalent expression for sin^2(x)cos^2(x) in terms of cos(2x).

Notice we have cos^2(2x) in the integrand now. We've made it worse! Let's try plugging back in to the first identity for cos^2(2x).

So then,

This is now integrable (phew),

Step-by-step explanation:

Answer:
B. 66
Step-by-step explanation:
73+25 = 98
Z = 98-32
Z = 66
Ok so first u would add 3+1 which gives u 4 and then add 1/4 which should give u 4 1/4