Math
問題一覧
1
is estimated that the annual cost of driving a certain new car is given by the formula
C= 0.25m + 9,600
where m represents the number of miles driven per year and C is the cost in dollars. Jane purchases such a car and determines between $5,350 and $5,600 for next year's driving cost. What is the corresponding range of miles that she can drive her new car?
Between 15,000 mi and 16,000 mi
2
At exactly what time after 5 o'clock wil the hour hand and the minute hand be perpendicular for the first time?
5:10 and 54 seconds
3
Find the equation of the line passing through the intersection of x -y=0 and 3x- 2y =2 cutting from the first quadrant a triangle whose area is 9.
×+2y-6=0
4
A ball bounces 2/3 of the altitude from which it falls. Suppose the ball is dropped from a height of 98 ft. How far will it travel before coming to rest?
90 ft
5
Evalvate lim (z -1-i)^2
———————
z - > 1 + i (z^2- 2z +2)^2
-9/4
6
Find the area of the polygon with vertices at 2 +3i, 3 +i, 2- - 4i, 4- - i, -9 + 2i.
47/2
7
* If the general equation of the conic Ax^2+Bxy+Cy^2+Dx+Ey+F=0. If B^2 - 4АС > 0 , then the conic
hyperbola
8
If the side of a square can be expressed as a^2bcube, what is the area of the square ni simplified form?
a^4b to the 6th power
9
Find the area bounded by y^2 = 4x and x^2 = 4y.
5.33
10
Hotels, like airlines, often overbook, counting on the fact that some people with reservations will cancel at the last minute. Acertain hotel chain finds 20% of the reservation will not be used. If 4 reservations are made, what is the chance that fewer than two will cancel?
0.8992
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19問 • 2年前問題一覧
1
is estimated that the annual cost of driving a certain new car is given by the formula
C= 0.25m + 9,600
where m represents the number of miles driven per year and C is the cost in dollars. Jane purchases such a car and determines between $5,350 and $5,600 for next year's driving cost. What is the corresponding range of miles that she can drive her new car?
Between 15,000 mi and 16,000 mi
2
At exactly what time after 5 o'clock wil the hour hand and the minute hand be perpendicular for the first time?
5:10 and 54 seconds
3
Find the equation of the line passing through the intersection of x -y=0 and 3x- 2y =2 cutting from the first quadrant a triangle whose area is 9.
×+2y-6=0
4
A ball bounces 2/3 of the altitude from which it falls. Suppose the ball is dropped from a height of 98 ft. How far will it travel before coming to rest?
90 ft
5
Evalvate lim (z -1-i)^2
———————
z - > 1 + i (z^2- 2z +2)^2
-9/4
6
Find the area of the polygon with vertices at 2 +3i, 3 +i, 2- - 4i, 4- - i, -9 + 2i.
47/2
7
* If the general equation of the conic Ax^2+Bxy+Cy^2+Dx+Ey+F=0. If B^2 - 4АС > 0 , then the conic
hyperbola
8
If the side of a square can be expressed as a^2bcube, what is the area of the square ni simplified form?
a^4b to the 6th power
9
Find the area bounded by y^2 = 4x and x^2 = 4y.
5.33
10
Hotels, like airlines, often overbook, counting on the fact that some people with reservations will cancel at the last minute. Acertain hotel chain finds 20% of the reservation will not be used. If 4 reservations are made, what is the chance that fewer than two will cancel?
0.8992