If you multiply an inequality by a positive number
switch the inequality sign
kee...
Mathematics, 30.12.2019 01:31, anoynomouskali9297
If you multiply an inequality by a positive number
switch the inequality sign
keep the inequality sign the same
and what if it's for a negative number?
Answers: 2
Mathematics, 21.06.2019 22:00, makenziehook8
Given that sinā
= 1/4, 0 < ā
< Ļ/2, what is the exact value of cosā
? a. (ā4)/4 b. (ā15)/4 c. (4Ļ)/2 d. (4ā2)/4
Answers: 2
Mathematics, 22.06.2019 01:00, SpeechlessZzz9920
For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)
Answers: 3