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3 years ago

Please help I will give brainliest to the right answer!!!

Mathematics

1 answer:

timama [110]3 years ago

5 0

Answer:

Step-by-step explanation:

Given function l:

h= -16t² + 26t

where h represents height and t represents time.

The time for dolphin atbthe height 5 feet is given by putting the value of h as 5 in the function,

5 = -16t² + 26t

16t² - 26t + 5 = 0

For this equation: a=16, b=-26, c=5

Use quadratic formula with a=16, b=-26, c=5.

x=(−b±√b2−4ac)/2a

x=−(−26)±√(−26)2−4(16)(5)/2(16)

x=13/16 + 1/16√89 or x=13/16+ −1/16√89

x=1.40 or 0.22

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iogann1982 [59]

Answer:

The answer is 108ft^2

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3 years ago

For each day enter the number of hours worked. Use the format shown in Model 1 and answer in terms of a reduced fraction.

natulia [17]

It is often easiest to use "military time". That is, add 12 to all the afternoon numbers and do the subtraction in the usual way. Of course, 1 hour = 60 minutes, so 10 minutes = 10/60 hour = 1/6 hour.

Mon: 15:10 -8:00 = 7:10 = 7 1/6

Tue: 15:25 -8:05 = 7:20 = 7 1/3

Wed: 14:30 -8:00 = 6:30 = 6 1/2

Thur: 14:45 -7:55 = 7:(-10) = 6:50 = 6 5/6

Fri: 15:38 -7:58 = 8:(-20) = 7:40 = 7 2/3

_____
Some calculators have nice features for working with degrees, minutes, and seconds. In this context, degrees and hours are the same thing. That is, the base-60 arithmetic is the same whether you consider the numbers to be hours or degrees. Similarly, some calculators convert nicely between decimal fractions and mixed numbers. In short, a suitable calculator will almost do this math for you. (You just need to add 12 to all the numbers in the column on the right.)

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3 years ago

sasha has a riddle: There are two numbers. The sum of the first number and twice the second number is 14.When the second number

N76 [4]

Answer: The first no. is 6 and the second no. is 4.

Step-by-step explanation: Let the 2 no. s be x and y respectively.

→x+ 2y = 14

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∴ x = 2+y

y = y

∴ x+2y=14

= 2+y+2y=14

3y=14-2

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∴y = 4

→x = 2+y

= 2+4=6

∴x=6

Thus, the first no. is 6 and the second no. is 4.

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3 years ago

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Advocard [28]

Answer:

$\text{B) }56\:\mathrm{cm^2}$

Step-by-step explanation:

The area of a triangle with height $h$ and base $b$ is given by $A=\frac{1}{2}bh$ . By definition, the base and the height must intersect at a 90 degree angle. Therefore, the diagram gives a base of 14 cm and a height of 8 cm. Substituting these values, we get:

$A=\frac{1}{2}\cdot 8\cdot 14=\boxed{\text{B) }56\:\mathrm{cm^2}}$

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3 years ago