18. S=r^2-t^2
S+t^2=r^2
r=sqrt(S+t^2)
20. Tan 18=x/12
x=12×Tan 18
x=3.899036355
x=3.90
I hope this helps.
Answer:
5/6
Step-by-step explanation:
subtract 3 from 18 to get the present people.
Answer: 78.5
Step-by-step explanation: Assuming you use 3.14 for pi, then 5^2 times 3.14 equals to 78.5. If you use the real number for pi, then it is going to be 78.54/
Answer: 11
Step-by-step explanation:
3+5.(5+4)÷3-7
3+5×8÷3-7
3+15-7
11
Bye
Since you want to find out how many papers Mr. Elliot grades per minute, and he grades 50 every 20 minutes, divide 20 by 20, and you get 1 minute, and now divide 50 by 20, and you get 2.5 papers per minute. Mr. Elliot grades 2.5 papers per minute.