A person is standing 350feet away from a model rocket that is fired straight up into the air at a rate of 15feet/sec. At what rate is the distance between the person and the rocket increasing (a)20 seconds after liftoff?(b)1 minute after liftoff.

Ashopper bought a watermelon a pack of napkins and some paper plates in his state there was no tax on food the tax rate on non-food items is 5% the total for the three items he bought was 825 before tags and he paid $0.19 in taxes how much did the watermelon cost

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.