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I need help with some math problems?
I JUST NEED YOU GUYS TO CHECK IF THEYRE RIGHT, I DONT NEED THE ANSWERS. but if some are wrong may i please have a hint as to how to get the right answer?
1)light travels at a speed of 3.0 X 10^10 cm/sec.what is the speed of light in feet per hour?
A)3.54X10^12ft/hr
2) A recipe for onion soup to serve 30 ppl requires 402 lbs of onions. you are giving a dinner party for 18 ppl. How many lbs of onion do you need to make onion soup for the 18 guests?
A)241.2 lbs
3)The density of gold is 19.3 g/cm cubed. you inherit a gold bar that measure 7.0 in. by 3.0 in. by 2.0 in. how many ounces does the bar weigh?
A)72.62 oz
4) A foundry releases 6.0 tons of gas into the atmosphere every day. The gas mixture contains 2.5% sulfur dioxide (SO2) by wieght. How many pounds of SO2 are released in one week?
A)2100lbs
5)The LD50 for drug is the dose that sould be fatalfor 50% of the popl The LD50 for aspirin in rats is 1.75 grams per kilogram of body weight. Calculate how many aspirin tablets a human weighing 155 pounds would have to take to reach this dosage. (1 aspirin=5grains=325 mg)?
A)actually i just noticed i dont have an answer for this one.
so yeah if you guys could help me with these thatd be great!
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