HELP ✋‼️‼️ What happens to the speed of a sound wave from an underwater animal as
the sound passes into the air above?
Water
Diamond
Glass
Air
1,493
12,000
5,640
346
Speed of
sound
(m/s)
A. It falls to zero.
B. It stays the same.
C. It increases.
D. It decreases.

What kind of simple machine is a catapult?

If anyone who can me with this hw? i would really appreciate it

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.