Xavier mixes \( \frac{4}{5} \) bucketsof coarse sand with \( 1 \frac{1}{5} \) buckets of cement to make a special type of concrete. How many buckets of concrete will he make? Tasneem is an intern at ZX Communications Agency. She earns R4 500 a month \( 1.2 .1 \quad \) Write the number 4500 in scientific notation. \( 1.2 .2 \quad \) Increase R4500 in the ratio \( 5: 6 .(2 \times 2) \)

To determine the total number of buckets of concrete Xavier will make, we first need to convert \( 1 \frac{1}{5} \) into an improper fraction. This gives us \( \frac{6}{5} \). When you mix this with \( \frac{4}{5} \) buckets of sand, simply add them together: \[ \frac{4}{5} + \frac{6}{5} = \frac{10}{5} = 2 \] So, Xavier will make 2 buckets of concrete. To write 4500 in scientific notation, you need to express it as a number between 1 and 10 multiplied by a power of 10. Here, you can write it as \( 4.5 \times 10^3 \). Now, increasing R4500 in the ratio \( 5:6 \) means you find the total parts of the ratio: \( 5 + 6 = 11 \). The amount per part is calculated by dividing R4500 by 5: \[ \frac{4500}{5} = R900 \] Then, to find the new amount, multiply the parts by 6: \[ R900 \times 6 = R5400 \] So, the increased amount is R5400.