# Mathematics

21Nov

21Nov

21Nov

### What are the exact solutions of x2 - 5x - 1 = 0?.

deborahoyedeji
Mathematics
2 0

21Nov

21Nov

21Nov

21Nov

21Nov

### 1.Calculate the amount of heat produced in an electric heater of resistance 1000 ohms if 6A of current is passed through it for 10 minutes.. 2.400J of heat is produced in 4s in a 4 ohm resistor.Find potential difference across the resistor.. 3. Calculate the power of a source if it produces an energy of 750J in 30s.. 4. Which uses more energy , a 500W TV set in 1 hour or a 1200W toaster in 10 minutes.. 5. Calculate the electrical energy consumed by a 1200W toaster in 10 minutes..

awesomeness101092
Mathematics
1 0

21Nov

### If the measure of is 232°, what is the measure of ∡DEF?.

boricua0608
Mathematics
2 0

21Nov

### A machinist is required to manufacture a circular metal disk with area 500 cm2.. (a) What radius produces such a disk? (Round your answer to four decimal places.). . . cm. . (b) If the machinist is allowed an error tolerance of ±7 cm2 in the area of the disk, how close to the ideal radius in part (a) must the machinist control the radius? (Round your answers to four decimal places.). cm

RobbinWalk811
Mathematics
1 5