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grigory [225]
3 years ago
12

H=45t-4.9t^2 what's the max height?

Mathematics
1 answer:
const2013 [10]3 years ago
7 0
Differentiate to find time that gradient=0 45-9.8t=0 45=9.8t t =4.59 secs put this value into original equation to get 103.31
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2 years ago
How do I write the sum of 6x and 2x is at least 39 ?
tatiyna
<h2>Put x = \dfrac{39}{8} I write the sum of 6x and 2x is at least 39 .</h2>

Step-by-step explanation:

We have,,

6x and 2x

To find, the value of x = ?

According to question,

The sum of 6x and 2x is at least 39

∴ 6x + 2x = 39

⇒ 8x = 39

⇒  x = \dfrac{39}{8}

∴ The value of x = \dfrac{39}{8}

Thus, put x = \dfrac{39}{8} I write the sum of 6x and 2x is at least 39 .

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