This exercise uses the radioactive decay model. If 250 mg of a radioactive ele Mathematics Assignment Help. This exercise uses the radioactive decay model. If 250 mg of a radioactive ele Mathematics Assignment Help.
(/0x4*br />
This exercise uses the radioactive decay model.
If 250 mg of a radioactive element decays to 190 mg in 24 hours, find the half-life of the element. (Round your answer to the nearest whole number.)
hr
This exercise uses the radioactive decay model. If 250 mg of a radioactive ele Mathematics Assignment Help[supanova_question]
selling homemade chips and different sources, management homework help Business Finance Assignment Help
Discovery and Planning for small food truck.Planning on selling homemade chips and different souces |
[supanova_question]
solving porptions work Mathematics Assignment Help
[supanova_question]
proportion math work question 4 Mathematics Assignment Help
|
Should an estimate or the exact answer be calculated? Then do the appropriate calculation.
Mr. Montgomery received a $20 gift card for a coffee shop. He made three purchase of $1.65 each and two more purchases of $3.95 each. How much money was then left on his card? |
|
A.
|
An estimate is sufficient. There is about $6.00 left on the card. | |
|
B.
|
The exact answer is needed. There is $7.15 left on the card. |
[supanova_question]
This exercise uses the radioactive decay model. The half-life of strontium-90 i Mathematics Assignment Help
This exercise uses the radioactive decay model.
The half-life of strontium-90 is 28 years. How long will it take a 70-mg sample to decay to a mass of 53.2 mg? (Round your answer to the nearest whole number.)
yr
[supanova_question]
[supanova_question]
Formulate a tentative law from the measurements, math homework help Mathematics Assignment Help
Formulate a tentative law from the measurements.
| Mass of Gas (in grams) | Volume of Gas (in L) |
| 22.5 | 1.60 |
| 35.8 | 2.55 |
| 70.2 | 5.00 |
| 98.5 | 7.01 |
Formulate a tentative law from the measurements, math homework help Mathematics Assignment Help[supanova_question]
Round the value 44.981 g to three significant figures, chemistry homework help Science Assignment Help
| Number | Significant figures | Explanation |
| 23.56 | 4 | All nonzero digits are significant. |
| 500.01 | 5 | Zeros between nonzero digits are significant. |
| 23.560 | 5 | Trailing zeros are significant when a decimal point is shown. |
| 0.0078 | 2 | Leading zeros are not significant. |
| 1000 | ? | Trailing zeros at the end of a number but before a decimal are ambiguous. |
[supanova_question]
Determine the number of significant figures in the measurement 0.0030 s, chemistry homework help Science Assignment Help
[supanova_question]
Determine the number of significant figures in the measurement 6.07 m, chemistry homework help Science Assignment Help
[supanova_question]
What was the average exam grade for each set of students? Use the two significant figures for my chemistry homework Science Assignment Help
From the surveys, you randomly select 10 students who studied for the exam and 10 students who did not study for the exam. You create the table showing the students’ exam grades given here:
Grades of 10 students who studied
| Exam grade | 94 | 95 | 90 | 88 | 89 | 100 | 77 | 96 | 98 | 63 |
Grades of 10 students who did not study
| Exam grade | 65 | 73 | 71 | 64 | 56 | 49 | 89 | 67 | 76 | 60 |
What was the average exam grade for each set of students?Enter the average exam grade of students who studied, followed by the average exam grade of the students who did not study, using two significant figures, separated by a comma.
[supanova_question]