It's 20. You start with the parentheses and 8 + 12 is 20. Then you have the brackets next, and so that's 20/4 and that's 5. Then all you have left is 4 x 5 which is 20.
Answer:
the answer is 78 degrees
Step-by-step explanation:
a acute angle is less than 90
Its less than bc if you turn them into decimals, 15/53 would be 0.42 and 12/20 would be 0.60
Answer:
169
Step-by-step explanation:
You need to use a Z-table for this.
There are different tables, in this table i searched for the probability of 97% because that equivalent to the top 3%.
for 0.97, Z = 1.88
The formula of Z is:

Solving x:

.020 because it is 2 spots behind the decimal