Mathematics, 12.07.2019 10:30 1230bering
the amount of radioactive element remaining, r, in a 100-mg sample after d days is represented using the equation r=100^ \frac{d}{5} )
. what is the daily percent of decrease? 87.06% 12.94% 3.13% 10%
Answers: 1
![\bf r=100\left( \frac{1}{2} \right)^{\frac{d}{5}}\\\\ -------------------------------\\\\ \textit{after 1 day how much remains?}\qquad \boxed{d=1}\qquad r=100\left( \frac{1}{2} \right)^{\frac{1}{5}} \\\\\\ r=100\left( \cfrac{1^{\frac{1}{5}}}{2^{\frac{1}{5}}} \right)\implies r=100\left( \cfrac{1}{\sqrt[5]{2}} \right)\implies r\approx 87.06 \\\\\\ \textit{used to be 100mg, it went down in 1 day to 87.06 or }12.94](/tpl/images/0080/5943/e2b83.png)
Another question on Mathematics
Mathematics, 21.06.2019 16:30
Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88
Answers: 1
Mathematics, 21.06.2019 19:30
The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?
Answers: 3
Mathematics, 21.06.2019 19:40
An alternative to car buying is to make monthly payments for a period of time, and then return the vehicle to the dealer, or purchase it. this is called
Answers: 3
Mathematics, 21.06.2019 21:40
Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0
Answers: 1
You know the right answer?
the amount of radioactive element remaining, r, in a 100-mg sample after d days is represented usin...
Questions
Mathematics, 12.03.2020 02:01
Biology, 12.03.2020 02:01
Mathematics, 12.03.2020 02:01
Business, 12.03.2020 02:01
Chemistry, 12.03.2020 02:01
Mathematics, 12.03.2020 02:01
Mathematics, 12.03.2020 02:01
History, 12.03.2020 02:02
Mathematics, 12.03.2020 02:02
