Help ASAP please Suppose cos(A)=4/5. Use the trig identity sin^2(A)+cos^2(A)=1 to find sin(A) in quadrant IV. Round to ten-thousandth

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Twenty-five percent of the customers entering a grocery store between 5 p. m. and 7 p. m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

When the ball has traveled a distance of

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.