4. A boat travels 210 km in 7 hours (with a constant
speed).
a. What is the constant of
proportionality? 5
b. Write an equation for
the how far the boat can
travel in x hours.
y=74
-show work please-

Given the choice between receiving $1.000.000 in one month or a single penny-doubled everyday for the period of one month; which option would you choice? show your work to support your answer. (assume that 1 month=30 days)

What is the area of triangle abc if a = 8, b = 11, and c = 15?

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?