I WILL GIVE BRAINLIEST IF CORRECT The diameter of a red blood cell is about 0.0008 cm. The diameter of a
whooping cough virus is about 2.5 x 10-5 cm. What is the approximate ratio
of the diameter of the red blood cell to the diameter of the whooping cough
virus?
A. 3.2 x 102
B. 3.1 x 10-3
C. 3.2 x 101
O D. 3.1 x 10-2

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

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