A certain element has a half life of 2.5 billion years. a. You find a rock containing a mixture of the element and lead. You determine that 55% of the original element remains; the other...

A certain element has a half life of 2.5 billion years. a. You find a rock containing a mixture of the element and lead. You determine that 55% of the original element remains; the other...

help me please

I`m able to get about half of this problem, but i just cant seem to get though it. Please help. Members of an executive committee of a math conference. Alan, Amy, Jessica, and Julia were...

What is the slope and what does it represent?

I think the answer is 90. Is that correct?

If there are 535 members of congress and 45 more republicians than democrats, how many of each party are there, assuming that there is no independents?

The coach of a soccer team is holding tryouts and can take only 3 more players for the team. There are 6players trying out. How many different groups of 3 players could possibly be chosen?

more than Beachcomber #2. If all three Beachcombers found a total of 82 seashells, how many did Beachcomber #1 find?

And mezzanine seats (the only other option) cost $16.25, how many mezzanine tickets were sold?

9. 1-1B John goes to the store with exactly $1.00 in change. He has at least one of each coin less than a half dollar coin, but he does not have a half dollar coin. a. what is the...

The sign says you are leaving Missoula, Butte is 120 mi away and Bozeman is 200 mi away. There is a erst stop halfway between Butte and Bozeman. How far is the rest stop from Missoula if both Butte...

if x is 6 less than y and y is twice of z then what is the value of x when z = 2

An office supply store recently sold a black printer ink cartridge for $18.99 and a color printer ink cartridge for $27.99. At the start of a recent fall semester, a total of 49 of these cartridges...

Soybean meal is 18% proteinprotein; cornmealcornmeal is 9% protein. How many poundspounds of each should be mixed together in order to get 360-lb mixturelb mixture that is 10% protein?

Miles paid $5,824, including 4% sales tax, for an out-of-state purchase of a car. In order to calculate the amount of sales tax he owes in his state, he must first determine the price of the car without...

A youth organization collected nickels and dimes for a charity drive. By the end of the 1-day drive, the youth had collected $60.5060.50. If there were five times as many dimes as nickels, how...

The octane rating of a gasoline is a measure of the amount of isooctane in the gas. Manufacturers recommend using 93-octane gasoline on returned motors. How much 87-octane gas and 95-octane gas should...

Each course at Pease County Community College is worth either 3 or 4 credits. The members of the men's swim team are taking a total of 48 courses that are worth a total of 155 credits. How many 3-credit...

dont know how to write out equation

The base of a new trophy has the form of a cyclinder sitting atop a rectangular solid. If 600 in3 of aluminum are needed to form the base, how tall is the rectangle portion