The half-life of a certain element is 100 days. How many half-lives will it be before only one-eighth of this element remains?

2

3

8

12.5

Use the aleks calculator to evaluate the expression. tan 88 degrees cos 21 degrees sin 60 degrees

Which rational numbers when multiplied by - 1/2 will result in a positive rational number as the product and why?

Kari' s grandmother has 1/6 pound of silver coins. She divides the coins evenly, by weight, amount her 4 grandchildren, including Kari, What fraction of a pound of silver coins does Kari receive? A. 1/24. B. 1/10. C. 1/2. D. 2/3

The math test scores of Mrs. Hunter's class are shown below. 48, 56, 68, 72, 72, 78, 78, 80, 82, 84, 88, 88, 88, 90, 94, 98, 100 What is the mode of the data? A) 72 B) 75 C) 78 D) 88

A store sold 650 bicycles last year. This year the store sold 572 bicycles. What is the percent decrease in the number of bicycles sold from last year to this year?

Mary has three lengths of cable, 3/6 yard long, 1/4 yard long, and 1/3 yard long, which two pieces together make a length of 20/24 yard?

Use the information given to identify the a_9 term of the geometric sequence: a_4=1/2, r=1/2

Man been says no th figures are parallelograms do you agree with manveen support your answer

What is the sum of 13+52 as the product of their GCF and another sum

Explain how you know 6/6 and 1are equivalent