Calculate a61 for the sequence {an} ={-5,-7/2,-2,-1/2,1,...} A. 173/2
B. 185/2
C. 85
D. 88

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.