Petra booked a family holiday. the total cost of the holiday was £3500 plus vat 20%. petra paid £900 of the total cost when she booked the holiday. she paid the rest of the total cost in 6 equal monthly payments. work out the amount of each monthly payment plzz do it, due !

£ 550

Step-by-step explanation:

Given,

The original cost of the holiday = £ 3500,

The percentage of VAT = 20%,

Thus, the amount of VAT = 20% of original cost

= 20% of 3500

= £ 700

∴ Total cost of the holiday = original cost + amount of the VAT

= 3500 + 700 = £ 4200

The amount already paid = £ 900,

So, the remaining amount have to pay = 4200 - 900 = £ 3300,

If this amount paid in 6 equal monthly payment,

Then the monthly payment =

=  £ 550

Step-by-step explanation:

From the given information:

The mean of the readings is:

= 157.1

The standard deviation (SD) can be computed by using the expression:

Standard deviation = 28.195

∴

FOr the EDTA complexes;

The signal detection limit = (3*SD) +

= (3*28.195) + 50

= 84.585 + 50

= 134.585

We need to point out that the value of the calibration curve given is too vague and it should be (1.75 x 10^9 M^-1) as oppose to  (1.75 x 10^-9 M^-1)

The concentration of detection limit is:

The lower limit of quantification is: