The amount of a certain toxin in the water is normally distributed with mean 72.4 mg and standard deviation 20 mg. the probability that the amount of toxin exceeds the safe limit is 0.14. what is the safe limit?

35 over 100 is what in simplest form

What is the slope of any line parallel to the line 5x+7y=7?

Which of these statements describe properties of parallelograms? Check all that apply. A. Diagonals bisect each other. B. Opposite angles are parallel. C. Opposite angles are congruent. D. Opposite sides are parallel. E.

The first of two numbers is 6 times the second. their sum is 77. find the numbers.

What does 0.3 tons equal to in pounds?

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.