He practiced for 1 hour and 30 minutes
Answer:
0.4
Step-by-step explanation:
4 juniors out of a total of 10
4/10 = 0.4
Answer:
Step-by-step explanation:
Given that a rectangle is inscribed with its base on the x-axis and its upper corners on the parabola
the parabola is open down with vertex at (0,2)
We can find that the rectangle also will be symmetrical about y axis.
Let the vertices on x axis by (p,0) and (-p,0)
Then other two vertices would be (p,2-p^2) (-p,2-p^2) because the vertices lie on the parabola and satisfy the parabola equation
Now width = 
Area = l*w = 
Use derivative test
I derivative = 
II derivative = 
Equate I derivative to 0 and consider positive value only since we want maximum
p = 
Thus width=
Length =
Width = 
Complete the square fr x and y's sepreatly to get into form
(x-h)²+(y-k)²=r²
the center is (h,k) and radius is r
so
group x's and y's seperatly
(4x²-10x)+(4y²+24y)+133/4=0
undistribute leading confident from each
4(x²-2.5x)+4(y²+6y)+133/4=0
take 1/2 of each linear confident and square it and add negative and positive inside the parenthasees
-2.5/2=-1.25 (-1.25)²=1.5625
6/2=3, 3²=9
4(x²-2.5x+1.5625-1.5625)+4(y²+6y+9-9)+133/4=0
factor perfect squares
4((x-1.25)²-1.5625)+4((y+3)²-9)+133/4=0
expand
4(x-1.25)²-6.25+4(y+3)²-36+133/4=0
4(x-1.25)²+4(y+3)²-9=0
add 9 to both sides
4(x-1.25)²+4(y+3)²=9
divide both sides by 4
(x-1.25)²+(y+3)²=9/4
(x-1.25)²+(y+3)²=(3/2)²
the center is (1.25,-3) and the radius is 1.5
Answer:
1.7. 9 () “ -- .3 .3 .4 . .9 F 5 XXX Ammo. Phosphate., 1916. . .8 10 0 “ -- .4 .2 .4 . . .9 Essex Fertilizer Co. E 7 Grain, Grass & Potato Fert. . . . . .8 12 0 Yes Passed .
Step-by-step explanation:
1.7. 9 () “ -- .3 .3 .4 . .9 F 5 XXX Ammo. Phosphate., 1916. . .8 10 0 “ -- .4 .2 .4 . . .9 Essex Fertilizer Co. E 7 Grain, Grass & Potato Fert. . . . . .8 12 0 Yes Passed .
