In a certain country, 800 pennies have the value of 100 ducates and 100 pennies have the value of 250 tolars. How many ducates have the same value of 100 tolars? (work out and explain)

What is one half plus one fifth?

What is the base of the power 6^7

The length of human pregnancies from conception to birth varies according to an approximately normal distribution with a mean of 266 days and a standard deviation of 16 days. What percentage of pregnancies last between 250 and 282 days?

car cost $.54 per mile to operate to find the cost of driving the car 23,000 miles you should use division

This table shows the number of miles that Sharon rode her bicycle in six weeks. If the mean number of miles she rode is 30, find the number of miles she rode in Week 3. Week 1 21 Week 2 34 Week 3? Week 4 25 Week 5 37 Week 6 22

Superman needs to save Lois from the clutches of Lex Luthor. After flying for 6 seconds, he is 1758 meters from her. Then at 9 seconds he is 1587 meters from her. What is Superman's average rate?

Find a whole number that, when added to the data set below, does not change the interquartile range. 18, 20, 22, 26, 27, 28, 30, 34 One possible whole number is__.

If Vector A is (6, 4) and Vector B is (-2, - 1), what is A - B? A. (8,5) B. (8,3) C. (4,5) D. (4,3)

What is the decimal for 36/10

What 2a=4.6 show your work