The half-life of radium is 1690 years. If 20 grams are present now, how much will be present in 250 years?

Which statement about rational numbers is true? A. all rational numbers are fractions. B. rational numbers never have repeating decimals C. some integers are not rational numbers D. all fractions containing integers are rational numbers

A coin is rigged such that the probability of getting tails is three times that of getting heads. on average, how many coin flips does it take to get two heads in a row?

Tiny Tim is 5 feet tall expression 0.5m + 60 can be used to calculate his height in inches if he grows an average of 0.5 inch each month. Using that expression, calculate tiny Tim's height in 6 months. A. 63 inches B. 56 inches C. 5 feet 6 inches D.

Round this number to the nearest 10. 32 A. 20 B. 40 C. 30

What is the ratio of 2 yards in 60 inches

What was considered the greatest American victory of the War of 1812? A) The Battle of New Orleans B) The Battle of Lake Erie C) The Battle of Tippecanoe D) The Battle of Thames

Solve for π in S=2πrh

how do ypu slove dis? y^2 (q-4) - c (q - 4)

What is the equation for an arithmetic sequence with the first term of 7 and the second term of 3

The sum of two numbers is 35. The greater number is 1 less than 6 times the smaller number. What are the two numbers