Solve the proportion.
Mathematics
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Estimate the value of the quantity.Joe wants to find out how far it is across the lake. His boat has a speedometer but no odometer. The table shows the boats velocity at 10 second intervals. Estimate the distance across the lake using right-end point values.
A. 3,710 ft B. 3,610 ft C. 5,400 ft D. 361 ft
Mathematics
Find the derivative of y with respect to the independent variable.y = 5cos ??
A. -5cos ?? ln 5 sin ?? B. 5cos ?? C. -?5cos ?? ln 5 sin ?? D. ?5cos ?? ln 5
Mathematics
Find the exact value without using a calculator. sin 
A. - 
B. -1
C. - 
D. 
Mathematics
Use the discriminant to determine whether the graph of the equation is an ellipse (or circle), a hyperbola, or a parabola.8x2 - 7xy + 7y2 - 20 = 0
A. Ellipse or circle B. Parabola C. Hyperbola
Mathematics