Which problem can be solved using the equation shown? 2.50x-2.00=10.50

Mathematics

2 answers:

Natalka [10]4 years ago

5 0

Answer:

Step-by-step explanation:

i did th test on edg

Leni [432]4 years ago

4 0

Answer:

The correct answer is a. Will bought several books that cost $2.50 each and received a $2.00 discount on his total bill. If he paid $10.50, how many books did he buy?

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Witold says that 50% of a number will always be greater than 20% of any other number. Complete one inequality to support Witold'

Lelu [443]

.50 x 2 < .20 x 100
1 < 20

50% of 2 is not greater than 20% of 100.

4 0

4 years ago

Situation:

stepan [7]

Answer:

t = 6162 years

Step-by-step explanation:

This equation takes the form of

$N=N_{0}e^{kt}$

We are given everything but the amount of C-14 at time t = 0. But we can figure it out from the info we ARE given. We are told that when the spear head is found it contains 54% of its original amount of C-14. Notice we are dealing in percents. If 54% remains when it is found, it started out with 100% of its amount. That's our N value. Filling in:

$100=54e^{.0001t}$

Our goal is to get that t down from the exponential position that it is currently in. To do that we will need to eventually take the natural log of both sides, because ln's and e's "undo" each other, much like squaring "undoes" a square, or dividing "undoes" multiplication. So we take the natural log of both sides. On the right side, notice that when we take the natural log, the e disappears; it's "undone", gone. Before that, though, we will simplify by dividing both sides by 54. 100/54 = 1.851851852. So, altogether...

$ln(1.851851852)=.0001t$