John is now ready to plant the tomato plants in the garden. He knows that he will work at a constant rate of 7.5 minutes for every 5 plants planted. John creates this proportion to calculate the total time, in minutes, it will take him to finish planting the number of tomato plants calculated in Question 4: 7.5 minutes 5 plants 60 minutes x plants Did John create an accurate proportion to determine the total time? If he did, finish calculating the proportion. If he did not create an accurate proportion, explain what the mistake is, correct his mistake, and finish calculating the proportion. Use 187 tomato plants

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11-1 > 1-1+a

-12 > a