Hello from MrBillDoesMath!
Answer:
Choice B
Discussion:
The answer shown highlighted is the correct answer
For a function, each value in the domain should be assigned a unique value in the range. In the case of ordered pairs, each x value in an order pair should have a unique y value. This aspect fails for Choices A, C, and D. Details follow.
Choice A: Not a function because (3,3), and (3,2) both have x = 3 but associated y value is not unique (equal 3 or 2)
Choice C: Not a function because (1,-1) and (1, -2) both have x = 1 but associated y value is not unique (equals -1 or -2)
Choice D: Not a function because (2,3) and (2,1) both have x= 2 but associated y value is not unique (equals 3 or 1)
Choice B has no such issues as an x value is repeated.
Thank you,
MrB
Answer:
what about it bro? what's wrong with it??
For what? There’s nothing there lol
Answer:
a). 
grains
b). 
c). 
years
Step-by-step explanation:
a). Given Sahara desert has an area of approximately = 9400000 km²
= 9400000×(10000000000) cm²
= 
cm²
Depth of the desert = 150 m
= 15000 cm
Volume of desert = Area × Depth
= 
= 
cm³
Since 1 cm³ holds sand grains = 8000
Therefore, Grains in Sahara Desert = 
=
b). Since 1 cm³ = 8000 grains
1 grain = cm³
c). A truck can carry sand = 20.5 m³ Or 
= 
cm³
Now time taken to recreate Sahara Desert = 
seconds
= 
= 
seconds
= 
years
= years
