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3 years ago

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Mathematics

1 answer:

butalik [34]3 years ago

5 0

Answer:

Step-by-step explanation:

- 16t² +400 = 0

t² = 400/16

t² = 25

t = 5 or t = - 5

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Please help! 15 Points!

san4es73 [151]

Answer:

Option C and D

Step-by-step explanation:

2π/3 refers 120°which falls in the second quadrant. In second quadrant sin value is positive and tan & cos value is negative.

tan 120 = - tan 60 = -√3

4 0

2 years ago

NEED HELP! Will give brainliest!!! Answer number 18 and 19

Zanzabum

18. 3 (-5 + 1) = 6 x -3 = -18 false its -14

19. 1/2 x 2 + 1/4 x 12 = 8 false its 4

7 0

3 years ago

in math class, 60 percent of the studnets are male and there are 30 students in class. how many students are males

stira [4]

Answer:

18 students

Step-by-step explanation:

60% of 30

(60*30)/100

1800/100 = 18 students

8 0

3 years ago

Read 2 more answers

Find the surface area

Semmy [17]

Answer:

The surface area is $198.75\ ft^2$

Step-by-step explanation:

Step 1: Determine the area of the bottom

$A = s^2$

$A = (7.5\ ft)^2$

$A = 56.25\ ft^2$

Step 2: Determine the area of the triangles

$A = \frac{h * b}{2}$

$A = \frac{9.5\ ft * \frac{7.5\ ft}{2}}{2}$

$A=\frac{9.5\ ft*3.75\ ft}{2}$

$A = 17.8125\ ft^2$

There are two of these right triangles on every side which means that we have 8 of these triangles so we multiply the area that we got by 8.

$A = 17.8125\ ft^2 * 8$

$A=142.5\ ft^2$

Step 3: Combine the area to get the surface area

$A_{total}=56.25\ ft^2+142.5\ ft^2$

$A_{total}=198.75\ ft^2$

Answer: The surface area is $198.75\ ft^2$

6 0

3 years ago

Draw to show how you can use models to compare 345 and 391

olga_2 [115]

345 =
|||,****,•••••

391 =
|||,*********,•

4 0

4 years ago