The answer must be

since the triangular pyramid has 4 faces and each has an area of 30

we should multiply that by 4 , so :
Answer:
see attached formulas
Step-by-step explanation:
Math is beautiful. Have fun learning.
Answer:
4√5
Step-by-step explanation:
Use Pythagorean theorem
a^2=21^2-19^2
a^2=441-19^2
a^2=441-361
a^2=80
a= √80
simplify
Answer:
Missing information.
Step-by-step explanation:
However, the domain is all the x- values. The range is all the y-values (that do not repeat).
So when you look at your graph, find your x values and y-values and write them as set. That is your answer.
85 because you divide 100/20 which gets 5 and then times 5 by 17