Answer: -7cos(x)
Step-by-step explanation:
d/dx (f(x))= -7cos(x)
40min*1.05=42min they spent 42 min together
ps: check the multiplication it's 01:30 and I did that in head
784/ 93 = 8.43010752688
93 * <span>8.43010752688 = 784</span>
Domain is the x values you can use
range is the y values
a.
the domain
hmm, seems to be all real numbers except for at x=0, it gets really close tho
so D=(-∞,0)U(0,∞)
range is all real numbers except for y=0, it gets really close tho
R=(-∞,0)U(0,∞)
b.
domain
that empty circle means something like < or >
goes from 5 to 6, not including 5
so domain is D=(5,6]
range is from -4 to 2, not including -4
range is R=(-4,2]
