25. time = distance/speed
[tex]\displaystyle t=\frac{66.5\,ft}{105\,\frac{mi}{h}}\times\dfrac{3600\,s}{h}\times\frac{1\,mi}{5280\,ft}\\\\=\frac{66.5\times 3600}{105\times 5280}\,s=\frac{19}{44}\,s\approx 0.432\,s[/tex]
It took about 432 milliseconds for the ball to travel to the batter.
26. 15 cans at Save Rite will cost 5 times the amount for 3 cans, so will be
... 5×$5.25 = $26.25
15 cans at Spend Less will cost 3 times the amount for 5 cans, so will be
... 3×$7.50 = $22.50
Maria paid $22.50 at Spend Less.
27. Simple interest is computed using
I = Prt . . . . where P is the principal, r is the annual rate, and t is the number of years.
Filling in the numbers gives the interest charge.
I = $8000×0.065×4 = $2080
Malik pays back the principal plus interest, so pays $8000 +2080 = $10,080.
