1. In a competitive exam of 40 questions, +3 marks is awarded for a correct answer and — 1 for evenr incorrect answer. Find the total score if a student had 11 wrong
answers in his attempt of all questions.
2. Write the sign of the following products:
...8 times
. 99 times.
3. A medical shop owner, gains 3 on selling each face mask and loses 2 on
selling each sanitizer. In a particular week, she sells 50 masks and some
sanitizers, losing 10 in all. How many sanitizers does she sell?
4. Find the product using suitable properties: (Mention the properties also)
a. x (-1) x 75 x (-25)
b. 632 x 2 + (-98) x (-632)
5. Evaluate:
a. [(-16) + 12] * [4 +
b. -73 * [(-41) + (-32)]
C. 15 x (-10) x 16
d. 100 (-200) - 50
6. Subtract the sum of 5000 and
173 from 4910.​

What is the slope of a line that is perpendicular to y = 3x + 1

Which of the following is missing in the explicit formula for the compound interest geometric sequence below?

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)