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gizmo_the_mogwai [7]
3 years ago
7

Help me, please? I dont understand these

Mathematics
1 answer:
vampirchik [111]3 years ago
8 0
Do you not know what slope is? Just use the slope formula which is y2-y1/x2-x1
Choose 2 coordinates and pick one of the y values to subtract by the other and the same x value correlated with ur first y value u subtracted minus the other x value
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A circular oil slick is expanding at a rate of 3m/min. How fast is the area of the oil slick changing when the diameter is 48 me
olga55 [171]

Answer:

48\pi \:m/min

Step-by-step explanation:

Diameter = 48 m

Therefore radius r = 48/2 = 24 m

Area  \: of \:  circular  \: oil  \: slick  \\ A = \pi {r}^{2}  \\  differentiating \: w \: r \: to \: t \: on \: \\  both \: sides \\  \\  \frac{dA}{dt} =  \frac{d}{dt} (\pi {r}^{2} )\\  \\  \frac{dA}{dt} =\pi  \frac{d}{dt} {r}^{2} \\  \\  \frac{dA}{dt} =\pi  \times  2{r}\\  \\  \frac{dA}{dt} =2\pi {r} \\  \\   \bigg(\frac{dA}{dt} \bigg)_{r=24} =2\pi \times  {24} \\  \\   \bigg(\frac{dA}{dt} \bigg)_{r=24} =48\pi  \: m \: per \: min

6 0
3 years ago
What is the area of the triangle shown
Sati [7]

Answer:

The answer is 40 sq. units

That is: 1/2×b×h (formula for area of triangle)

1/2×10×8

= 40

7 0
3 years ago
$2.95 notebooks; 5% tax
dimaraw [331]
Turn 5% into a decimal which is 0.05, then multiply by 2.95 = 0.1475
round it off, which is 0.15
so $0.15 is the tax and if ur looking for the total price then add $2.95 to $0.15
7 0
3 years ago
Read 2 more answers
The sum of 9and -16 increased by 4
LenaWriter [7]

Answer:

-3

Step-by-step explanation:

The statement is,

→ Sum of 9 and -16 increased by 4

The equation will be,

→ {9 +(-16)} + 4

→ (9 - 16) + 4

→ -7 + 4

→ [ -3 ]

Hence, the solution is -3.

7 0
2 years ago
Can you please help<br> Me
Delvig [45]
I’m positive it’s dababy
4 0
3 years ago
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