Which of the following statements is true? Before Jenner's vaccine, there was no prevention for smallpox.
Edward Jenner developed the first vaccine for cowpox.
Vaccination is only necessary for children under 5 years old.
Missed vaccinations can be given during "catch-up" periods.

step-by-step explanation:

once you graph it hit 2nd (the blue button) and graph

that takes you to a table of coordinates

on the left is x coordinates and on the right is y coordinates and an empty box

(you may have to scroll up/down in order to get ( x, 0)

7

step-by-step explanation:

choice b

step-by-step explanation:

f(x) = 88x^2 -264x + 300

the line of symmetry of a parabola is defined by

h = -b/2a

where ax^2 +bx+c=0

so

h = - -264/ (2*88)

h = 3/2

so x = 1.5