Question

418. What should y be if f(x) = xy defines a polynomial functions? A. an integer B. a non negative integer C. any number D. any number but zero
19. The opposite angles of a quadrilateral inscribed in a circle are A. right B. obtusa C. complementary D. supplementary
20. An arc of a circle measures 30°. If the radlus of the circle is 5 cm, what is the length of the arc? A. 2.62 cm B.2.3 cm C. 1.86 cm D. 1.5 cm
21. A dart board has a diameter of 40 cm and is divided into 20 congruent sectors. Find the area of a sector. A. 201 cm? B. 40 cm? C. 80 cm? D. 800 cm?​

Answer 1

Answer:

enough vinegar is used, all of the baking soda can be made to react and disappear into the vinegar solution. The reaction is: Sodium bicarbonate and acetic acid reacts to carbon dioxide, water and sodium acetate.

Answer 2

Answer:

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Step-by-step explanation:

1. C
2. b
3. C
4. b