Bentley has 0.67 worth of pennies and nickels he has a total of 23 pennies and nickels altogether determine the number of pennies and nickels at Bentley has

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle