Hi can you help on this question Andrew was born in the year 19xy. In 2021, y and x will be the tens and units digits of his
age. What is the least age he can be in 2015?

Thanks

Which of the following scenarios demonstrates an exponential decay

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25