50 points i really don't understand these 4 problems**1. select the expressions that are equivalent to 5/6x^4. select all that applya.5x^-4/6b.6^-1x^-4/5^-1c.25/1 296d.30x2.if n x 10^p is a number written in scientific notation, which statements are true? select all that apply. a. n is a whole numberb.1< =n< 10c. p is positived. p can be positive, negative, or zero3. select the expression that is equivalent to 1.26 x 10^-3 -7.003x10^5a. -5.734 x 10^3b. 1,260 - 7,003,000c. 8.82378 x 10^18d. 0.001260 - 7,003,0004. select the expression that is equivalent to (8 x 10^5)(9 x 10^3) .a. (8+9)(10^5+10^3)b. 8 x 9 x 10^5+3c. 8 x 9 x 10^5 x 3d. (8+x)(10^5+10^3)

step-by-step explanation:   divide the numerator by the denominator to get the decimal

it would still be 193

if divide by 100 then 1.93

i am not sure

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)