To go to phoenix by a car is a 2.5 hr drive. phoenix is about 200 miles from tucson. if i travel 500 miles, how long will it take?

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

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The trigonometric ratios sine and secant are reciprocals of each other