If a=7.8, b= 3.2 are two legs of a right triangle find cos A
What will be an ideal response?
0.2619
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Solve the problem.The sum of the measures of the angles in any triangle is 180 ° . In triangle ABC, angles A and B have the same measure, while angle C is 63 ° larger than each of the other two angles. Find the measure of 
A. 78 ° B. 141 ° C. 102 ° D. 39 °
Evaluate the following:
1. 
2. 
3. 
Find the vertex, focus, and directrix of the parabola with the given equation.(x + 4)2 = -4(y + 1)
A. vertex: (-4, -1) focus: (-4, -2) directrix: y = 0 B. vertex: (-1, -4) focus: (-1, -5) directrix: y = -3 C. vertex: (-4, -1) focus: (-4, 0) directrix: x = -2 D. vertex: (4, 1) focus: (4, 0) directrix: y = 2
Solve. Use the fact that the radius of the Earth is 3960 miles and 1 mile = 5280 feet.A guard tower at a state prison stands 103 feet tall. How far can a guard see from the top of the tower? Round to the nearest tenth of a mile.
A. 17.6 mi B. 909 mi C. 12.4 mi D. 5600.3 mi