To find the amount A in an account after t years with principal P and an annual interest rater (in decimal form) compounded n times per year, use the formula

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step-by-step explanation:

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step-by-step explanation:

place r′ so that qr′ is parallel to the tangent.

now we get that ∠r′py=∠pr′q, where y is on the tangent, on the opposite side of p from x.

also, because of the symmetry, ∠r′py=∠qpx.

finally, note that no matter where we place r, as long as it's on the correct arc, we have ∠prq=∠pr′q.

stringing all these equalities together, we end up with ∠prq=∠qpx.

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beth buys 10 x shirts and still has more than 100 in her account