#45 how many solutions exist for the equation (cos^2x//5)=0

check the picture below.

notice, you're asked to use a graphing calculator to get them.

45. A graphing calculator shows there to be 3 solutions. (There is no algebraic way to find them.)

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Rewriting the equation to

... f(x) = cos(x)² -x/5

We note sign changes in this function between 0 and π/2, between π/2 and π, and between π and 3π/2. Outside the range 0 to 3π/2, there are no more sign changes, hence no more solutions.

stew reads at the fastest rate of 265 words per minute.

step-by-step explanation:

it's a given that felicia reads at 260 word per minute and on connie's graph we can see that she reads 200 words per minute. since stew's table tells us that he read 795 in 3 minutes, we can divide 795 by 3 to find out how many words he reads per minute.

795/3 = 265

stew reads 265 words per minute - he reads at the fastest rate since felecia reads at 260 words per minute and connie reads at 200 words per minute.

stew (265) > felecia (260) > connie (200)

what is the graph

step-by-step explanation: