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12345 [234]
3 years ago
9

if there are 40 question and each question carrying 5 marks and each wrong attempt can deduct 3 marks. if someone secured 70 mar

ks then how many question he has attempted
Mathematics
1 answer:
weeeeeb [17]3 years ago
3 0
The answer is 14. Simply divide 70 by 5.
You might be interested in
How to memorize multiplication tables in one day?
padilas [110]
You cannot memorize a whole multiplication chart in one day, but if you go online and search multiplication stories, there may be some stories to help you memorize your facts quicker depending on your learning style. Also try and remember that any number times any number is just that number being added over and over again a certain amount of times. For example: 3*4= 3+3+3+3 Hope this helps :)
6 0
3 years ago
The value of a car is expected to decrease exponentially. Which formula can you use to predict the value of the car for a given
IgorLugansk [536]
Hey there!

When the value of something goes down over time- a house, a car, anything- it's called depreciation. 

It would be expressed as exponential decay. This is because the value is going down exponentially as stated in the problem. Additionally, when it decays, the growth factor is less than one, so the value steadily decreases.

Let's rule out our other options:

B) Half-Life. This doesn't work because it's usually used for radioactive decay, which is usually a steady decrease of radioactivity and material that divides by two, hence the word half. For example:

Day 0) Started with 10 grams of plutonium
Day 1) 5 grams
Day 2) 2.5 grams

And so on.

C) Compound Interest. Like simple interest, but compunds usually at a certain point - yearly, monthly, every ten years, and so on. But, this is used for interest, mostly in a bank account or if you have a loan. It doesn't exhibit depreciation, and therefore it's not used to predict car value.

D) Exponential Growth- Exponential growth does not work for one main reason - it grows. That would mean that the value of the car goes up- and unless it's an old and very expensive car, that wouldn't be the case.

Hope this helps!
5 0
3 years ago
Please try to answer as many as possible. Thanks
Art [367]
For the first one the answer is 2
6 0
2 years ago
Following a major renovation, the monthly population of patrons visiting a theme park grew according to the model P=3,000(1.21)^
babymother [125]
P= 3000 (1.21)^t,  t= time in months

1 year = 12 months, and therefore, 1 month = 1/12 years

The equation showing yearly population growth changes to;

P=3000 (1.21)^t/12

The  correct answer is equation [1].
8 0
3 years ago
List 3 values that would make this unequally true 48 < 6n
charle [14.2K]
N> 8
Any value greater than 8 will work for n you choose

And this is why

48 < 6n
same thing as 
6n > 48
divide by 6 on both sides
And that leaves you with 
n>8

Examples which would work
n=9, n=120, n=756, n = 12
7 0
3 years ago
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